Rarely does a woman have the good fortune to discover her pregnancy in the first few days. Typically, pregnancy symptoms begin to appear 2-5 weeks after fertilization. And once the "miracle" is confirmed, women begin to count the weeks, days, hours, and minutes of their pregnancy.
First, two cells are formed from one cell, then a transverse constriction appears, dividing these two cells into two more - there become four of them, then eight, sixteen, thirty-two, and so on.
The third trimester of pregnancy lasts from week 28 until the baby is born. The doctor will calculate a specific due date (40 weeks), but the baby is considered full-term if born between weeks 37 and 42.
The second trimester of pregnancy lasts from weeks 13 to 27. This is the period during which most women begin wearing maternity clothes and their "interesting condition" becomes noticeable...
Pregnancy is measured in trimesters from the first day of the last menstrual period—40 weeks in total. The first trimester lasts 12 weeks, or three months...
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