Gestation and birth

Question 1

first trimester

Answer 1

organogenesis occurs (development of heart, eyes, gonads, limbs, liver, brain)

Question 2

second trimester

Answer 2

tremendous growth occurs, movement behind and the face becomes distinctly human and the digits elongate

Question 3

third trimester

Answer 3

rapid growth and brain development continue, and there is transfer of antibodies to the fetus

Question 4

during birth

Answer 4

the cervix thins out and the amniotic sac ruptures
Then, uterine contractions, coordinated by prostaglandins and oxytocin, result in birth of the fetus. Finally, the placenta and umbilical cord are expelled.