Pregnency week by week
Pregnency week by week
What happens during a normal 40 week Pregnency? What does the fetus look like? Have a look at week by week pregnency development.
Week 1 - The is just the start of the 40 week long incubation period. At this time a woman is starting her last period. The beginning all starts here. No drinking or smoking would be wise.
Week 2 - The uterine lining is thickening, ovulation is about to occur. This is where the sperm will meet up with the egg and start the process.
Week 3 - Ovulation has come and gone. Implantation will occur this week as long as the sperm has reached the egg in time.
Week 4 - The body is starting to realize the changes that have occurred. A urine Pregnency test would be positive at this point and the signs in place.
Week 5 - The heart beings to beat and the baby is an embryo now. By the end of the week it will be 1.5 - 2.5 mm in length.
Week 6 - The baby is still growing fast and will be 4-6 mm by the end of the week. The upper and lower limb buds will appear and the larynx and inner ear start to form.
Week 7 - Hand plates and genital tubercle become present, but the gender cannot be determined...yet. The nasal pit form and the baby is 7 - 9 mm long.
Week 8 - The gonads start to develop (male/female), hind brain is visible, and spontaneous movement occurs. At the end of the week the baby will be 8 - 11 mm.
Week 9 - The elbows are visible, toes formed, and gonads have become male/female. Baby is 13 -17 mm or 0.51 - 0.66 inches long and weighs 1 grams.
Week 10 - Baby enters fetal stage or second trimester. Toes are formed, eyes largely open, and external genitalia beginning to become apparent. External ears and lips are formed. The baby will no longer look like a tad-pole now, weighing in at 4 grams and 1.06 - 1.38 inches long.
Week 11 - Head is about half the size of the body. The iris and finger nails develop. The baby is 7 grams.
Week 12 - 14 grams and 3.54 inches long, reflexes develop and the digestive track get ready for life on the outside.
Week 13 - Teeth are in place and ready for the days of teething. Intestines move into place and the pancreas starts secreting insulin. The baby is now 1 oz.
Week 14 - The baby is 4.92 inches and can produce urine. H/she will also practice breathing.
Week 15 - Sucking habits form and the baby will suck a thumb. Skin is thin and blood vessels can bee seen. Hair patterns develop as the baby is now 70 grams.
Week 16 - Nails and ears are well formed. Movements more coordinated and gender can be detected with ultrasound. The baby is 3 oz and 6.3 inches.
Week 17 - Loud noises can startle baby at this point. The baby is 5 oz.
Week 18 - 7 oz and 8.1 inches long this week as the bones continue to harden, and fingerprints develop.
Week 19 - At 8 oz, girls ovaries now contain eggs. Lanugo or a fine hair covers the baby's body and permanent teeth buds form.
Week 20 - Sleep patterns can be detected as the baby grows to 10oz, 9.8 inches.
Week 21 - In the third trimester the baby can still move, but will change to a head down position later in this trimester. 13oz.
Week 22 - Eyebrows are visible as the baby weighs in at 15 oz and 10.8 inches long.
Week 23 - Baby is unaffected by Braxton Hicks contractions. First stool is developing and the baby is 1 lb, 2 oz.
Week 24 - Baby has a chance of survival if born now. Steroid shots can help develop the lungs if pre-term labor is detected.
Week 25 - Baby's bones continue to harden and h/she grows to 1 lb, 9 oz.
Week 26 - Baby is aware of light and dark. Noises can be heard and h/she weighs 1 lb 2 oz and 12.8 inches long.
Week 27 - Baby is still moving and growing at 2 lbs.
Week 28 - Eye lashes developing, boys testes descend. At 13.8 inches and 2 lbs. 4 oz a baby born now has very good chance at survival.
Week 29 - Movements start to decrease and should be motored by using fetal kick counts. Baby is 2 lbs 9 oz.
Week 30 - 3 lbs and 14.8 inches long, contractions noticed by baby now, but h/she is unaffected.
Week 31 - Irises dilate and contract due to light and the baby weighs 3 lbs. 5 oz.
Week 32 - 15.8 inches, 3 lbs 11 oz. Movements peak as baby gets ready.
Week 33 - This week the baby is at a 4 lbs and there is even a less chance of prematurely if born now. Lungs are preparing for birth.
Week 34 - At 4 lbs 7 oz and 16.8 inches long, hormones from the placenta start to activate milk in breast.
Week 35 - Organ systems have been present, but now their getting ready for the life outside the womb.
Week 36 - Baby is dropping and breathing become much better for mom as the baby weighs in at 5 lbs. 2 oz.
Week 37 - Baby can get hiccups and kicks slow.
Week 38 - Baby can gain up to 1 oz a day now. Get that bag packed, if not ready.
Week 39 - Some women don't last this long. Baby is ready!
Week 40 - Happy Birthday! Most baby's average 7.5 lbs and 20 inches long at birth.
Enjoy these moments they don't last long enough. Pregnency week by week is over now.
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