Inside pregnancy: Weeks 1 to 9

Inside pregnancy: Weeks 1 to 9

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2:17 min| 26,525,031 views

In early pregnancy your baby grows dramatically, from a tiny dot to the size of a grape.

Video note: Contains medically accurate illustrations.

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Show transcript

Within a week of conception, your fertilized egg, known as a blastocyst, will make its way to your uterus. The egg is about the size of a pen tip.

In days, the cells in the egg arrange themselves into groupings. The inner cell mass will become your baby. The outer cells will become the amniotic sac and placenta.

The blastocyst then sheds its protective casing in a process called hatching, and burrows into the lush uterine wall.

Around week 5, your developing baby is the size of a sesame seed. The cells that once formed the blastocyst's inner cell mass begin organizing and arranging, giving shape to the young embryo and forming primitive organs.

Your baby's brain and spinal cord are visible through his translucent skin.

Right around this time, your baby's circulatory system also forms and his heart begins to beat.

Your baby looks more like a tiny tadpole than a human. He's drawing nutrients and oxygen through the newly formed placenta and umbilical cord.

By week 9, the embryonic tail is gone. Your baby's looking more human every day, with protruding limbs and fingers, a defined nose, mouth, and eyes, and tiny earlobes.

Your new resident is about the size of a grape and weighs a fraction of an ounce.

It's hard to believe how rapidly one cell evolves in such a short time into the unmistakable body of a baby.

Watch the video: Inside Pregnancy: Weeks 21-27. BabyCenter (July 2022).


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