Multiple choice During pregnancy which among the following changes happens in a female? Plasma hCG level is at the height between weeks 10 and 14 of gestation. The secretion of placental progesterone is maximum in the first 8 weeks of gestation. Blood flow in kidneys remain unchanged. Maternal respiratory rate gets increased. Reveal answer Fill a bubble to check yourself D Correct answer Explanation Respiratory rate is normally unchanged during gestation.