When a woman is pregnant, she is truly eating for two. Every food, medication, supplement and drug affects her growing baby. Her body also produces different levels of hormones to support the pregnancy. Each month, a woman’s body cycles through a variety of hormones that regulate the buildup of blood in the uterus to support a pregnancy, the maturation of an egg and the withdrawal of hormones that lead to menstruation.1 Progesterone is one of those hormones and the one that is often called the “pregnancy hormone”2 because of the important role it plays, from implantation of the embryo to delivery of the baby. After the egg is released from the ovary, the corpus luteum produces progesterone to maintain the early stages of pregnancy.3 The corpus luteum is a group of cells that form just after the egg leaves the ovary. The progesterone makes the uterus a healthy environment for …