Which of the following is peptide hormone produced by ovary ?

Options

A. Progesterone
B. Estrogen
C. Inhibin
D. All of these

Answer

To determine which of the following is a peptide hormone produced by the ovary, we will analyze each option provided:

1. **Progesterone**:
- Progesterone is a steroid hormone produced by the corpus luteum in the ovary. Its primary role is to maintain pregnancy and prepare the uterine lining for implantation. Since it is a steroid hormone, it is not classified as a peptide hormone.

2. **Estrogen**:
- Estrogen is also a steroid hormone produced by the ovaries. It plays a crucial role in the regulation of the menstrual cycle and is involved in the development of female secondary sexual characteristics. Like progesterone, it is not a peptide hormone.

3. **Inhibin**:
- Inhibin is a peptide hormone produced by the granulosa cells of the ovaries. Its main function is to inhibit the secretion of follicle-stimulating hormone (FSH) from the anterior pituitary gland, thus playing a role in the regulation of the menstrual cycle. Since it is a peptide hormone, it fits the criteria of the question.

4. **All of these**:
- This option suggests that all the hormones listed (progesterone, estrogen, and inhibin) are peptide hormones produced by the ovary. However, since we have established that both progesterone and estrogen are steroid hormones, this option is incorrect.

Based on the analysis above, the correct answer to the question "Which of the following is a peptide hormone produced by the ovary?" is:

**Option C: Inhibin**