Second Trimester

Second Trimester : (Period from 13th to 26th week) It is a period of rapid growth of the foetus. The uterus grows enough that the pregnancy becomes visibly obvious. The foetus is very active and grows to about 30 cm, and development of the brain begins. Hormone levels stabilise during this period — human chorionic gonadotropin (hCG) declines, the corpus luteum regresses (deteriorates), and the placenta completely takes over production of the progesterone that maintains the pregnancy. …