Pregnancy Videos & Photos - The Fourth Month

Your Pregnancy - Fourth Month Photo

Brought to you by Nine Months To Birth

The placental membrane allows exchanges to occur more freely between mother and fetus. The fetus grows, becomes more human-looking and tends to become more independent. The placenta: a more permeable barrier.

The placenta is now entirely functional. It takes up 20 to 25% of the area of the uterus. From the 6th month of development, it has completely replaced the corpus luteum by secreting more and more hormones; in this way, it provides mother and fetus with more estrogen and progesterone, a capacity that is specific for human beings. The fetus is now less sensitive to harmful substances than the embryo was.



Pregnancy Video: Weeks 13-16 (4th Month)



Of Special Interest In Your 16th Week

Month 3

Monthly Pregnancy Calendar

Month 5

Your pregnancy is determined from the date of last menstral period, not date of conception. Each pregnancy, expectant mother, and unborn child is different. Your pregnancy may not progress the same as the information found here. The information here is based on the average pregnancy. It is not meant to be a replacement for any advice your may recieve from your doctor. If you have any concerns about your pregnancy, we advise you to contact your doctor.
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