Question: how long will an unfertilized egg stay in the uterus?
Answer: A normal ovulation cycle lasts for about 24 hours each month. Once an egg is released from an ovary, it will die or dissolve within 12 to 24 hours if it's not fertilized. If fertilization doesn't occur, the egg and your uterine lining will shed. This results in menstrual bleeding about two weeks later.