Question

During pregnancy ______.

Options

• the ovarian and uterine cycles occur more quickly than before

• GnRH is produced at a higher level than before

• the ovarian and uterine cycles do not occur

• female secondary sex characteristics are not maintained

Answer 1

During pregnancy the ovarian and uterine cycles do not occur.

Explanation:

This is because the corpus luteum produces progesterone, which maintains the uterine lining and inhibits the secretion of GnRH, thereby preventing the ovarian cycle. Hence, menstruation ceases to ensure a stable environment for the developing embryo. Thus, the ovarian and uterine cycles do not occur. This stoppage prevents the regular menstrual cycle and supports pregnancy maintenance.