What is the term for the release of the egg from the ovary?

• A. Menstruation
• B. Implantation
• C. Ovulation
• D. Fertilization

Answer: (C)

The release of the egg from the ovary is called ovulation. In each cycle a mature follicle releases the secondary oocyte in response to hormonal signals, especially a surge of luteinizing hormone from the pituitary. After the egg is released, it moves into the fallopian tube where fertilization by a sperm may occur. If fertilization doesn’t happen, the egg isn’t needed and the cycle proceeds to menstruation, where the uterine lining is shed. The other terms refer to different events: menstruation is the shedding of the uterine lining, implantation is when a fertilized egg attaches to the uterine lining, and fertilization is the joining of sperm and egg to form a zygote. Understanding ovulation helps explain how timing of intercourse relates to pregnancy and why the cycle can vary between individuals.