Which of the following is not a function of progesterone?

Options

A. Gestation
B. Inhibition of ovulation
C. Uterine growth and development
D. Stimulation of mammary secretion

Answer

To determine which of the following options is not a function of progesterone, we need to analyze each option based on the known functions of the hormone.

1. **Understanding Progesterone**: Progesterone is a steroid hormone primarily involved in the female reproductive system. It is secreted by the corpus luteum after ovulation and plays a critical role in preparing the uterus for pregnancy.

2. **Analyzing Each Option**:
- **Option A: Gestation**: Progesterone is essential for maintaining pregnancy (gestation). It helps prepare the endometrium (the inner lining of the uterus) for implantation of the fertilized egg and supports the early stages of pregnancy. Therefore, this is a function of progesterone.

- **Option B: Inhibition of Ovulation**: Progesterone also plays a role in inhibiting ovulation during the luteal phase of the menstrual cycle. It prevents the release of further eggs, making this another function of progesterone.

- **Option C: Uterine Growth and Development**: Progesterone contributes to the growth and development of the uterus during pregnancy, making it a function of this hormone.

- **Option D: Stimulation of Mammary Secretion**: This option refers to the stimulation of mammary glands for milk production. While progesterone does have some role in breast development, the primary hormone responsible for stimulating milk secretion is prolactin, not progesterone. Therefore, this is not a function of progesterone.

3. **Conclusion**: Based on the analysis, the option that is not a function of progesterone is **Option D: Stimulation of Mammary Secretion**.