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JAMB Biology 1990 Question 29

Question 29

Reproduction in Animals

During mammalian embryo development, large amounts of oestrogen and progesterone are produced in the

  1. A.umbilical cord
  2. B.amnion
  3. C.placenta
  4. D.amniotic fluid
Show the answer and explanation

Answer: C (placenta)

Explanation

From about the third month of pregnancy the placenta produces oestrogen and progesterone, which keep the pregnancy going.