Question

Explain the luteal phases in the menstrual cycle of a human female.

Answer 1

• The luteal phase lasts from ovulation to the commencement of menstruation.
• During this stage, the ruptured follicle develops into the corpus luteum, which secretes progesterone.
• The endometrium thickens further.
• Progesterone preserves the thicker uterine lining and prepares it for embryo implantation.
• If fertilisation does not occur, the corpus luteum degenerates, causing a reduction in progesterone levels and the onset of menstruation.