Question

Which hormone is secreted by ovary?

• A. HCG
• B. HPL
• C. Relaxin
• D. Oxytocin

Hint:

Remember: Ovary secretes Estrogen, Progesterone and Relaxin, whereas HCG and HPL are placental hormones and Oxytocin is released from the posterior pituitary.

Answer 1

The Correct Option is C

Concept: The ovary functions both as a reproductive organ and as an endocrine gland. It secretes several hormones that regulate the female reproductive cycle and pregnancy. The major ovarian hormones include: \[ \text{Estrogen},\quad \text{Progesterone},\quad \text{Relaxin} \]

Step 1: Examine each hormone. HCG Human Chorionic Gonadotropin (HCG) is secreted by the placenta during pregnancy. HPL Human Placental Lactogen (HPL) is also secreted by the placenta. Relaxin Relaxin is secreted by the ovary, particularly by the corpus luteum during pregnancy. It helps relax pelvic ligaments and facilitates childbirth. Oxytocin Oxytocin is secreted from the posterior pituitary gland.

Step 2: Identify the ovarian hormone. Among the given options, only Relaxin is secreted by the ovary. \[ \boxed{\text{Relaxin}} \] Hence, the correct answer is \[ \boxed{(C)\ \text{Relaxin}} \]