This is the final week of the embryonic stage. After this week, the baby (even until delivery) is officially called “the fetus.” Elbows, ears and upper lip are already formed .
Milk teeth, which will begin to come out during the first year of baby’s life are already formed. Fingers are distinguished and membranes between them disappeared. The child becomes similar to a human being. The genitals of boys and girls look the same. Boys begin the secretion of testosterone. Changes occur gradually, so that there is no significant weight gain observed. During pregnancy after in vitro fertilization the dose of progesterone gradually declines.