Which gland primarily produces the hormone that regulates the menstrual cycle?

Which gland primarily produces the hormone that regulates the menstrual cycle?

• A. Ovaries
• B. Testicles
• C. Pancreas
• D. Thyroid

Answer: (A)

The hormones that regulate the menstrual cycle are produced mainly by the ovaries. Estrogen and progesterone from the ovaries control the cycle: estrogen helps build the uterine lining in the first half, and progesterone maintains it after ovulation. The pituitary gland does send signals (FSH and LH) to coordinate ovarian function, but the hormones that directly regulate the cycle come from the ovaries themselves. The other glands listed don’t produce these cycle-regulating hormones—testes make male hormones, the pancreas regulates blood sugar, and the thyroid sets metabolic rate. So the ovaries are the primary source.

The hormones that regulate the menstrual cycle are produced mainly by the ovaries. Estrogen and progesterone from the ovaries control the cycle: estrogen helps build the uterine lining in the first half, and progesterone maintains it after ovulation. The pituitary gland does send signals (FSH and LH) to coordinate ovarian function, but the hormones that directly regulate the cycle come from the ovaries themselves. The other glands listed don’t produce these cycle-regulating hormones—testes make male hormones, the pancreas regulates blood sugar, and the thyroid sets metabolic rate. So the ovaries are the primary source.