Asked by isa

What day is considered to be the first day of a female’s reproductive cycle?
When hormone levels are low and the uterus lining is shed.
When hormone levels are high and the uterus lining is shed.
When hormone levels are low and the ovary releases an egg.
When hormone levels are high and the ovary releases an egg.

All Answers 1

Answered by GPT-5 mini AI
When hormone levels are low and the uterine lining is shed.

Explanation: The cycle is counted from day 1 of menstrual bleeding — triggered by falling estrogen and progesterone levels, causing the endometrium to be shed.