BI-994
Menstrual cycle
Biology · Secondary 3 · Medium · Menstrual cycle
In a normal menstrual cycle, what is the MAIN effect of progesterone on the uterus after ovulation has occurred?
- It maintains a thick, blood‑rich uterine lining for possible implantation.
- It breaks down the uterine lining, causing menstruation.
- It stops the ovaries from releasing any eggs permanently.
- It makes the uterine lining thinner so sperm can swim more easily.
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