"Pregnancy is a long, 10-month journey,"
Dr. Draion Burch
An obstetrician and gynecologist at Magee-Womens Hospital at the University of Pittsburgh Medical Center.
Human gestation divided into THREE trimester:
•First Trimester (1st)
•Second Trimester (2nd)
•Third Trimester (3rd)
*1 trimester = 3 month
First Trimester
The first trimester is the main period of organogenesis, development of the body organs.All the major structures are present by 8 weeks.The embryo is called a fetus
During its first 2 to 4 weeks, the embryo obtains nutrients directly from the endometrium. Meanwhile, the outer layer of the blastocyst, called the trophoblast, mingles with the endometriumand eventually forms the placenta. Blood from the embryo travels to the placenta through arteries of the umbilical cord and returns via the umbilical vein.
4 week |
7 week |
8 week |
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