Suddenly cold and hot will affect fetal development

Adults can feel hot and cold changes, and add or reduce the clothing. Will fetus in the mother’s womb be affected by temperature changing?

We know that, under normal circumstances, the amniotic fluid to maintain a certain temperature, the fetus in the amniotic fluid has been protected. However, over-cold or overheated environment is not good to growth and development of the fetus.

Pregnant women, living in hot environment, not only will lead to a emotional irritability, and it is also very unfavorable to fetus.

You must pay attention to the air-conditioning in the summer and heater in the winter. Now, almost all the building are equipped with air-conditioning, banks, department stores, cinemas, air-conditioning are particularly strong. Prolonged stay in air-conditioned room, the fetus would not have good effects. For example, pregnant women living in the cold, blood vessels to contract, easily leads to uterine contraction. Rapid uterine contraction would cause a pain. At this time, for an early pregnancy, may cause miscarriage, for a late pregnancy, there is the risk of preterm birth, even if not so, it would be uncomfortable to fetus.

In other words, although the fetus is protected in the amniotic fluid though, but do not forget that the fetus is still naked.

Great events for small fetus -5

44 pregnant 32 weeks, baby had to wait a half-liter of urine a day, but the good news is you do not need to change diaper.

45 There is no smell from the air in uterus, but your baby developed sense of smell from the pregnancy of 32 weeks..

46 from 32 ~ 35 weeks pregnant, fetal weight increase to about 250 grams per week.

47 at this stage, your baby's brain development is very fast, so head circumference increased by 2.5 centimeters every week.

48 fetal lung development is also very fast - babies born in 34 weeks may have to be breathing under assistance, but the 36-week premature child will be able to breathe himself.

49 Usually an unborn baby is 35 weeks in pregnancy weight 2.5 kg. Everyday you walk around with such a big man, no wonder you feel back pain!

50 Fetal sebum is a smooth material, wrapped in the surface of the body to keep body moisture, protect the skin and help she slip into the birth canal. Sebum in the third trimester will be washed away, the traces of fat tire can be found in most of babies at birth, however, it can not be found on later-born babies. In fact, if birth over the due date, baby’s skin will be dry and the traces of their own nails likely to be found on baby’s body.

51 there is evidence in fetal brain scans shows that baby can have a dream when she sleep from about 32 weeks pregnant.

52, the last week of pregnancy, inside the digestive system of baby filled with meconium - a by dead skin cells, lanugo, intestine, waster material from liver and gall bladder- a dark green black thing. This is a baby's first stool, the most viscous, most difficult to deal with you have ever met.

53 fetal bones became hard, but the skull is still quite soft, in order she can smoothly through the birth canal. Therefore, if the baby was born with a conical shaped head, do not be worry.

54 pregnant 36 weeks, the fetus's head began to move into the pelvis, if the midwife can only touch the baby’s 2/5 head above the pelvis, then you have to be prepared, because the baby will due soon.

55 35-week-old fetus hearing has been fully developed, so remember to talk with her.

56 The survival rate of the baby, who was born in 35 weeks old, can reach 99%.

57 In the past more than nine months, the placenta gave the baby all the energy she needed. In 40 weeks, pregnant can be a big dinner plate size, 2 ~ 3 cm thick, weighing 0.6 kilograms.

58 Some babies are born bald, while others have a thick and long hair - baby's hair can be up to 2.5 cm.

59 to the end of pregnancy, uterine size increased 500 ~ 1000 times than before.

60 Only 5% of babies are born on the predetermined due date. Do not be impatient if over due, most pregnant women will give natural birth after 42 weeks pregnancy.

Great events for small fetus -4

29 pregnant 21 weeks when the fetus grows to a size of a banana, and the weight is similar to a banana.

30 pregnant 21 weeks, the fetus can identify the flavor of the food you eat through the amniotic fluid, especially sweet and bitter taste.

31 experts can successfully implement the operation to compensate inherent deficiencies for unborn fetus in womb, such as the hole on the heart. And the operation can be carried out without opening the uterus. Minimally invasive techniques have made great contribution to this.

32 In the latter half of pregnancy, your uterus will be enlarged 1 cm a week or so.

33 pregnant 24 weeks, the brain of fetus started activation. Her brain wave patterns are similar to newborn baby’s. Studies have shown that she has begun to consciously think. She is able to differentiate the voices of their parents, if you repeatedly put her to listen to a song, she will remember after the birth.

34 pregnancy 24 weeks is a very important turning point in the pregnancy. The fetus has been able to "live", and if give a birth at this time, the survival rate can reach about 39%.

35, when 24 weeks pregnant, you always feel there is something to tap your belly. Oh, this is baby does a burp.

36 pregnant 24 weeks, the baby has her own daily routines, but do not get too excited, her daily routine is likely to opposite to yours.

37 fetus in the womb to drink amniotic fluid, of course, very small amount for each time. Amniotic fluid will be refilled every three hours, so even if the baby drank a lot of amniotic fluid, amniotic fluid volume inside the womb will not be reduced.

38 pregnant 27 weeks, the baby opened her eyes, but until the birth, her vision has not been very well developed and can only stare at one thing to see, and can only see things within 15 cm.

39 from 28 ~ 32 weeks pregnant, fetal growth is about 500 grams per week (equal to the weight of a regular sized box of margarine). Now you know why you always can not fit yourself into the clothes.

40 Approximately 28 weeks of pregnancy, due to the space is more and more narrow, the baby began to curl up into a ball and to make the most classic fetal position.

41 The temperature of amniotic fluid is about 37.5 ℃, slightly higher than body temperature, to ensure that the fetus to be warm enough, while the fetus is also working hard to increase her fat reserves in order to not feel cold after the birth.

42 The increase of your weight is not fully because of your baby – in 30 weeks pregnant, your placenta weighs about 450 grams, it conducts about 500 milliliters of blood transmission per minuet into your baby’s body.

43 to 35 weeks of pregnancy, most fetuses have been moved to the fetal position at birth. There are several fetal positions:

Vertical production-type refers to baby lying in the womb vertically, head down, butt down, or feet down (breech).

Horizontal production style refers to baby lying horizontally.

Oblique production style refers to baby lying obliquely.

Breech presentation, transverse and oblique style production can result in dystocia, but the fetus can also be automatically changed the fetal position under the guidance of a doctor. To 40 weeks, 95% of the normal fetus is upside down fetal position, and only around 4% will be breech fetal position, while the horizontal or oblique style production accounted for only less than 1%.

Fetal development - 3

Fetal period

The fetal period begins at the end of the 10th week of gestation (8th week of development). Since the precursors of all the major organs are created by this time, the fetal period is described both by organ and by a list of changes by weeks of gestational age.

Because the precursors of the organs are formed, fetus also is not as sensitive to damage from environmental exposures as the embryo. Instead, toxic exposures often cause physiological abnormalities or minor congenital malformation.

Changes by organ

Each organ has its own development.

Development of circulatory system

Heart development

Development of digestive system

Tooth development

Development of endocrine system

Development of integumentary system

Development of lymphatic system

Development of muscular system

Development of nervous system

Development of the urinary and reproductive system

Development of the reproductive system

Development of the gonads

Development of respiratory system

Changes by weeks of gestation

From the 8th week until birth (around 38 weeks), the developing organism is called a fetus. The fetus is not as sensitive to damage from environmental exposures as the embryo, and toxic exposures often cause physiological abnormalities or minor congenital malformation. All major structures are already formed in the fetus, but they continue to grow and develop.

Fetus at 8 weeks after fertilization. Weeks 10-12

Gestational age: 9–11 weeks old.

Embryonic age: Weeks nr 8-10. 7–9 weeks old.

Embryo measures 30 mm-8 cm (1.2-3.2 inches) in length.

Intestines rotate.

Facial features continue to develop.

The eyelids are more developed.

The external features of the ear begin to take their final shape.

The head comprises nearly half of the fetus' size.

The face is well formed

The eyelids close and will not reopen until about the 28th week.

Tooth buds, which will form the baby teeth, appear.

The limbs are long and thin.

The fetus can make a fist with its fingers.

Genitals appear well differentiated.

Red blood cells are produced in the liver.

Weeks 13 to 16

Gestational age: 12–15 weeks old.

Embryonic age: Weeks nr 11-14. 10–13 weeks old.

The fetus reaches a length of about 15 cm (6 inches).

A fine hair called lanugo develops on the head.

Fetal skin is almost transparent.

More muscle tissue and bones have developed, and the bones become harder.

The fetus makes active movements.

Sucking motions are made with the mouth.

Meconium is made in the intestinal tract.

The liver and pancreas produce fluid secretions.

Fetus at 18 weeks after fertilization. Week 19

Gestational age: 18 weeks old.

Embryonic age: Week nr 17. 16 weeks old.

The fetus reaches a length of 20 cm (8 inches).

Lanugo covers the entire body.

Eyebrows and eyelashes appear.

Nails appear on fingers and toes.

The fetus is more active with increased muscle development.

"Quickening" usually occurs (the mother and others can feel the fetus moving).

The fetal heartbeat can be heard with a stethoscope.

Week 23

Gestational age: 22 weeks old.

Embryonic age: Week nr 21. 20 weeks old.

The fetus reaches a length of 28 cm (11.2 inches).

The fetus weighs about 725 g (1 lb 10 oz).

Eyebrows and eyelashes are well formed.

All of the eye components are developed.

The fetus has a hand and startle reflex.

Footprints and fingerprints continue forming.

Alveoli (air sacs) are forming in lungs.

Week 27

Gestational age: 26 weeks old.

Embryonic age: Week nr 25. 24 weeks old.

The fetus reaches a length of 38 cm (15 inches).

The fetus weighs about 1.2 kg (2 lb 11 oz).

The brain develops rapidly.

The nervous system develops enough to control some body functions.

The eyelids open and close.

The cochleae are now developed, though the myelin sheaths in neural portion of the auditory system will continue to develop until 18 months after birth.

The respiratory system, while immature, has developed to the point where gas exchange is possible.

Week 31

Gestational age: 30 weeks old.

Embryonic age: Week nr 29. 28 weeks old.

The fetus reaches a length of about 38–43 cm (15-17 inches).

The fetus weighs about 2 kg (3 lb 0 oz).

The amount of body fat rapidly increases.

Rhythmic breathing movements occur, but lungs are not fully mature.

Thalamic brain connections, which mediate sensory input, form.

Bones are fully developed, but are still soft and pliable.

The fetus begins storing iron, calcium, and phosphorus.

Week 35

Gestational age: 34 weeks old.

Embryonic age: Week nr 33. 32 weeks old.

The fetus reaches a length of about 40–48 cm (16-19 inches).

The fetus weighs about 2.5 to 3 kg (5 lb 12 oz to 6 lb 12 oz).

Lanugo begins to disappear.

Body fat increases.

Fingernails reach the end of the fingertips.

A baby born at 36 weeks has a high chance of survival, but may require medical interventions.

Fetus at 38 weeks after fertilization. Weeks 36 to 39

Gestational age: 35–38 weeks old.

Embryonic age: Weeks nr 34-37. 33–36 weeks old.

The fetus is considered full-term at the end of the 37th week of gestational age.

It may be 48 to 53 cm (19 to 21 inches) in length.

The lanugo is gone except on the upper arms and shoulders.

Fingernails extend beyond fingertips.

Small breast buds are present on both sexes.

Head hair is now coarse and thickest.

The development is continued postnatally with child development stages

Great events for small fetus -2

19 fetus at 12 weeks in the pregnancy began to develop reflective capacity. If her arm or leg grazed the face, she will be pursed lips for sucking like, if the encounter eyelids, she will be made a blink action.

20 most of the mothers in three months of pregnancy, the amniotic fluid is only can be filled an egg cup, but in one month, the water can almost be filled a bottle.

21 pregnant 12 weeks, the baby's weight 14 grams - equivalent to an iPod Shuffle player weight.

22 pregnant 13 weeks, the fetus have fingerprints, she is now a big plum’s size.

23 As early as 13 weeks of pregnancy, the fetus's head had already appeared pink hair, as well as eyebrows and eyelashes, whole body wrapped in lanugo, which can help keep warm. Lanugo usually will detach off in the third trimester.

24, when in 14 weeks pregnant, the baby can smile and frown.

25 Although the fetal eyelids still closed, she can already feel the light and dark.

26 pregnant 15 weeks, experienced doctors will be able to determine the sex of the fetus with ultrasound equipment.

27 pregnant 20 weeks, the color Doppler image may show a normal human ------ development is complete, has been right proportional.

28 If your baby is a girl, then within 20 weeks in the pregnancy she formed the eggs can reach 3 million.

Fetal development - 2

Embryonic period

The embryonic period in humans begins at fertilization (12-24hrs after ovulation, generally between the 2nd and 3rd week of gestational age) and continues until the end of the 10th week of gestation (8th week by embryonic age).

The zygote spends the next few days traveling down the Fallopian tube. Meanwhile it divides several times to form a ball of cells called a morula. Further cellular division is accompanied by the formation of a small cavity between the cells. This stage is called a blastocyst. Up to this point there is no growth in the overall size of the embryo, so each division produces successively smaller cells.

The blastocyst reaches the uterus at roughly the fifth day after fertilization. It is here that lysis of the zona pellucida, a glycoprotein shell, occurs. This is required so that the trophectoderm cells, which give rise to extra-embryonic structures such as the placenta, of the blastocyst can come into contact with the luminal epithelial cells of the endometrium. (Contrast this with zona hatching, an event that occurs in vitro by a different mechanism, but with a similar result). It then adheres to the uterine lining and becomes embedded in the endometrial cell layer. This process is also called implantation. In most successful pregnancies, the conceptus implants 8 to 10 days after ovulation (Wilcox et al. 1999). The inner cell mass forms the embryo, while the outer cell layers form the membranes and placenta. Together, the embryo and its membranes are referred to as a conceptus, or the "products of conception".

Rapid growth occurs and the embryo's main external features begin to take form. This process is called differentiation, which produces the varied cell types (such as blood cells, kidney cells, and nerve cells). A spontaneous abortion, or miscarriage, in the first trimester of pregnancy is usually due to major genetic mistakes or abnormalities in the developing embryo. During this critical period (most of the first trimester), the developing embryo is also susceptible to toxic exposures, such as:

Alcohol, certain drugs, and other toxins that cause birth defects, such as Fetal alcohol syndrome

Infection (such as rubella or cytomegalovirus)

Radiation from x-rays or radiation therapy

Nutritional deficiencies such as lack of folate which contributes to spina bifida

Generally, if a structure pre-dates another structure in evolutionary terms, then it often appears earlier than the other in an embryo; this general observation is sometimes summarized by the phrase "ontogeny recapitulates phylogeny." For example, the backbone is a common structure among all vertebrates such as fish, reptiles and mammals, and the backbone also appears as one of the earliest structures laid out in all vertebrate embryos. The cerebrum in humans, which is the most sophisticated part of the brain, develops last. The concept of recapitulation is not absolute, but it is recognized as being partly applicable to development of the human embryo.

Gestational age vs. embryonic age

Gestational age is the time that has passed since the onset of the last menstruation, which generally or as standard occurs 2 weeks before the actual fertilization. Embryonic age, in contrast measures the actual age of the embryo or fetus from the time of fertilization. Nevertheless, menstruation has historically been the only means of estimating embryonal/fetal age, and is still the presumed measure if not else specified. However, the actual duration between last menstruation and fertilization may in fact differ from the standard 2 weeks by several days.

Thus, the first week of embryonic age is already week three counting with gestational age.

Furthermore, the number of the week is one more than the actual age of the embryo/fetus. For example, the embryo is 0 whole weeks old during the 1st week after fertilization.

The following table summarizes the various expression systems during week number x of gestation.

Week

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number Reached age

(whole weeks)

Gestational x x-1

Embryonic x-2 x-3

Week 1-2

Gestational age: 0 to 1 (whole) weeks old. 1–14 days from last menstruation.

Embryonic age: -2 to -1 weeks old. That is, week 1-2 of gestational age are merely theoretical extrapolations of embryonic age, since the fertilization hasn't actually occurred yet.

Week 3

Gestational age: 2 (whole) weeks old. 15–21 days from last menstruation.

Embryonic age: Week nr 1. 0 (whole) weeks old. 1–7 days from fertilization.

Fertilization of the ovum to form a zygote. (day 1 of fert. )

The zygote undergoes mitotic cellular divisions, but does not increase in size. This mitosis is also known as cleavage. A hollow cavity forms marking the blastocyst stage. (day 1.5-3 of fert. )

The blastocyst contains only a thin rim of trophoblast cells and a clump of cells at one end known as the "embryonic pole" which include embryonic stem cells.

The embryo hatches from its protein shell (zona pellucida) and performs implantation onto the endometrial lining of the mother's uterus. (day 5-6 of fert. )

If separation into identical twins occurs, 1/3 of the time it will happen before day 5.[6]

Week 4

Gestational age: 3 weeks old. 22–28 days from last menstruation.

Embryonic age: Week nr 2. 1 week old. 8–14 days from fertilization.

Trophoblast cells surrounding the embryonic cells proliferate and invade deeper into the uterine lining. They will eventually form the placenta and embryonic membranes. The blastocyst is fully implanted day 7-12 of fert.

Formation of the yolk sac.

The embryonic cells flatten into a disk, two cells thick.

If separation into identical twins occurs, 2/3 of the time it will happen between days 5 and 9. If it happens after day 9, there is a significant risk of the twins being conjoined.

Primitive streak develops. (day 13 of fert. )

Primary stem villi appear. (day 13 of fert. )

Week 5

Gestational age: 4 weeks old. 29–35 days from last menstruation.

Embryonic age: Week nr 3. 2 weeks old. 15–21 days from fertilization.

A notochord forms in the center of the embryonic disk. (day 16 of fert. )

Gastrulation commences. (day 16of fert. )

A neural groove (future spinal cord) forms over the notochord with a brain bulge at one end. Neuromeres appear. (day 18 of fert. )

Somites, the divisions of the future vertebra, form. (day 20 of fert. )

Primitive heart tube is forming. Vasculature begins to develop in embryonic disc. (day 20 of fert. )

Embryo at 4 weeks after fertilization. The crown-rump length is about 0.2 inches.[7]

A 10mm embryo from an ectopic pregnancy, still in the oviduct. This embryo is about five weeks old (or from the seventh week of menstrual age). Week 6

Gestational age: 5 weeks old. 36-42 days from last menstruation.

Embryonic age: Week nr 4. 3 weeks old. 22-28 days from fertilization.

The embryo measures 4 mm (1/8 inch) in length and begins to curve into a C shape.

The heart bulges, further develops, and begins to beat in a regular rhythm. Septum primum appear.

Branchial arches, grooves which will form structures of the face and neck, form.

The neural tube closes.

The ears begin to form as otic pits.

Arm buds and a tail are visible.

Pulmonary primordium, the first traits of the lung appear.

Hepatic plate, the first traits of the liver appear.

Buccopharyngeal membrane ruptures. This is the future mouth.

Cystic diverticulum, which will become the gallbladder, and dorsal pancreatic bud, which will become the pancreas appear.

Urorectal septum begins to form. Thus, the rectal and urinary passageways become separated.

Anterior and posterior horns differentiate in the spinal cord

Spleen appears.

Ureteric buds appear.

This embryo is also from an ectopic pregnancy, this one in the cornu (the part of the uterus to which the Fallopian tube is attached). The features are consistent with a developmental age of seven weeks (reckoned as the ninth week of pregnancy).

Week 7

Gestational age: 6 weeks old. 43–49 days from last menstruation.

Embryonic age: Week nr 5. 4 weeks old. 29–35 days from fertilization.

The embryo measures 8 mm (1/4 inch) in length.

Lens pits and optic cups form the start of the developing eye.

Nasal pits form.

The brain divides into 5 vesicles, including the early telencephalon.

Leg buds form and hands form as flat paddles on the arms.

Rudimentary blood moves through primitive vessels connecting to the yolk sac and chorionic membranes.

Week 8

Gestational age: 7 weeks old. 50–56 days from last menstruation.

Embryonic age: Week nr 6. 5 weeks old. 36–42 days from fertilization.

The embryo measures 13 mm (1/2 inch) in length.

Lungs begin to form.

The brain continues to develop.

Arms and legs have lengthened with foot and hand areas distinguishable.

The hands and feet have digits, but may still be webbed.

The gonadal ridge begins to be perceptible.

The lymphatic system begins to develop.

Week 9

Gestational age: 8 weeks old. 57–63 days from last menstruation.

Embryonic age: Week nr 7. 6 weeks old. 43–49 days from fertilization.

The embryo measures 18 mm (3/4 inch) in length.

Fetal heart tone (the sound of the heart beat)can be heard using doppler.

Nipples and hair follicles begin to form.

Location of the elbows and toes are visible.

Spontaneous limb movements may be detected by ultrasound.

All essential organs have at least begun formation.

Great events for small fetus -2

19 fetus at 12 weeks in the pregnancy began to develop reflective capacity. If her arm or leg grazed the face, she will be pursed lips for sucking like, if the encounter eyelids, she will be made a blink action.

20 most of the mothers in three months of pregnancy, the amniotic fluid is only can be filled an egg cup, but in one month, the water can almost be filled a bottle.

21 pregnant 12 weeks, the baby's weight 14 grams - equivalent to an iPod Shuffle player weight.

22 pregnant 13 weeks, the fetus have fingerprints, she is now a big plum’s size.

23 As early as 13 weeks of pregnancy, the fetus's head had already appeared pink hair, as well as eyebrows and eyelashes, whole body wrapped in lanugo, which can help keep warm. Lanugo usually will detach off in the third trimester.

24, when in 14 weeks pregnant, the baby can smile and frown.

25 Although the fetal eyelids still closed, she can already feel the light and dark.

26 pregnant 15 weeks, experienced doctors will be able to determine the sex of the fetus with ultrasound equipment.

27 pregnant 20 weeks, the color Doppler image may show a normal human ------ development is complete, has been right proportional.

28 If your baby is a girl, then within 20 weeks in the pregnancy she formed the eggs can reach 3 million.

Fetal development - 1

Fertilization

A sperm fertilizing an ovum

When semen is deposited in the vagina, the spermatozoa travel through the cervix and body of the uterus and into the Fallopian tubes. Fertilization of the ovum (egg cell) usually takes place in the Fallopian tube. Many sperm must cooperate to penetrate the thick protective shell-like barrier that surrounds the ovum. The first sperm that penetrates fully into the egg donates its genetic material (DNA). The egg then polarizes, repelling any additional sperm. The resulting combination is called a zygote. The term "conception" refers variably to either fertilization or to formation of the conceptus after uterine implantation, and this terminology is controversial.

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Prior to fertilization, each ovum contains a complete human genome, including a single X but no Y chromosome. Likewise, each spermatozoon contains a complete set of autosomes and a single sex chromosome, either X or Y. The resulting zygote is similar to the majority of somatic cells because it contains two copies of the genome in a diploid set of chromosomes. One set of chromosomes came from the nucleus of the ovum and the second set from the nucleus of the sperm. If the spermatozoon contributes a Y chromosome then the zygote will develop as a male. Unlike the X chromosome, the Y chromosome contains very little genetic information. However it does contain a gene, SRY, which will switch on androgen production at a later stage, leading to the development of a male body type. In contrast, the mitochondrial genetic information of the zygote comes entirely from the mother via the ovum.

Great events for small fetus-1

From a tiny fertilized egg, to a lovely baby, life, what will be the magical experience?

1 Although only one sperm can fertilize an egg, there will be about 100,000 sperm swim into the cervix together, to prepare for the formation of embryos.

2 sperm "broke" the egg to form a fertilized egg -------- the time required to make your pregnancy is approximately 24 hours.

3 The chance of the formation of twins is 2%. If a sperm and an egg, and then split into two fertilized eggs, it will produce monozygotic twins-identical twins. If two different eggs and sperm were combined, they produce dizygotic twins. Dizygotic twins with a family history, whereas monozygotic twins is a random phenomenon.

4 of pregnancy at 4 weeks, the fetus only looks like a poppy seed.

5 Baby’s sex is depending on your partner. All eggs only have the X chromosome, while sperm can have an X or Y chromosome is. If the sperm with an X chromosome with the egg, then you will give birth to daughters; if the sperm with the Y chromosome with the egg, you will have a son.

6 of pregnancy at 6 weeks, the fetus had a heartbeat. But the size only likes a lentils.

7 Feel tight pants, right? 6 weeks pregnant, your uterus has already become the apple size from the size of plum.

8 to 7-week pregnancy, the fetus already has three distinct brain areas, which is the basis of all the acts and ideas in the future.

Forebrain: responsible for problem solving, reasoning and memory.

Middle brain: to guide the corresponding brain region to respond to stimulation on the body.

Rear Brain: Control physical activities, such as breathing, heartbeat and muscle movement.

9 Sequence of development of fetal activity:

7 weeks: she began beating the clumsy.

8 weeks: she can bend wrist of the (yes, she has a wrist!).

10 weeks: she has learned to swallow and kick.

12 weeks: Fetal lungs began to try breathing exercises.

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16 weeks: she can grasp the umbilical cord.

18 weeks: Many first-time mothers began to feel fetal movement.

20 weeks: the most active period of fetus, stretching, flipping, somersaults ... ...

30 weeks: amniotic fluid volume started to decrease, so does a buffer that reduces the activities of the fetus, mother felt that fetal movement can be more evident.

32 weeks: Because of narrow space, and fetal activity frequency and amplitude are reduced.

35 weeks: fetal position in the womb (ie, fetal position) is unlikely to change.

10 pregnant 8 weeks, she has officially become the fetus, DON’T FORGET TO CELEBRATE!

11 If in the pre-natal check, the fetus heartbeat can be heard, then the chance of miscarriage is reduced to only 2%.

12 from a tadpole-liked fertilized egg to a human-liked fetus only take two weeks!

13 to 10 weeks of pregnancy when the fetus is only a pea-pod size, but she has been able to distinguish the eyes, ears, nose, mouth, limbs, and even the rudiments of fingers and toes.

14 tiny fingernails and deciduous teeth protruding appeared to 10 weeks pregnant

15 If you can observe the fetus sucking thumb, then which hand is the favorite from 10 weeks of pregnancy will be able to see the future she will be a right-handed or left-handed. Belfast University conducted a study to show that: In the 12-year-old children, who liked to suck their right thumbs in the womb are accustomed to using right-handed, but who had their left thumb in the womb, there is 2/3 chance they are left-handed.

16 pregnant 10 weeks, the fetus has been able to respond to the touch. If you poke the stomach, she will be twisted to escape - but you do feel nothing.

17 Fetal heart rate is 110 ~ 160 times per minute, that was about twice the speed of your heart.

18 all the major organs - heart, lung, kidney, brain and gut - into the development of at least 10 weeks have been formed and fully developed. Now all the remaining task of the fetus to grow up.