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.

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Question: What day is considered to be the first day of a female's reproductive cycle?

Answer: When hormone levels are low and the uterus lining is shed.