Keep up with the latest Women s Health news directly from Ob-Gyn Associates of Albany.
Endometriosis strikes many women Endometriosis strikes many women.
During this cycle, the hormones estrogen and progesterone send messages to the lining of the uterus. About day 5 of the cycle, the estrogen causes the lining of the uterus to grow and thicken. Around day 14, an egg is released from the ovary. After this, progesterone causes the glands to release nutrients and blood vessels swell to prepare for the possibility of pregnancy. If the egg is not fertilized, it moves to the uterus and is absorbed or disintegrates.