Doula

Answer: D - The hormones that support pregnancy - estrogen and progesterone - are produced by the corpus luteum under the influence of the hormone hCG until the placenta takes begins to produce them after the 10^th week of pregnancy. Progesterone, not testosterone, keeps the mother's body from having an immune response to her fetus as a foreign object. Estrogen production is highest right before birth, and drops immediately afterwards. Relaxin is a hormone that softens ligaments - great for allowing the pelvis to stretch during birth, but not so great when it makes a pregnant mother more prone to injury and digestive upsets.