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What are the four stages of the menstrual cycle?
Day 1-5, Menstruation
Day 6-12, Follicular phase
Day 13-14, Ovulation
Day 15-28 Luteal phase
What does bloody fluid leaving the body during menstruation contain?
endometrial cells, glandular secretions, and blood cells
After bleeding ceases and the endometrium begins to repair itself, what does the maturing follicle in the ovary release?
estrogen, which aids in the repair
What happens in the ovulation stage of menstrual cycles?
the follicle ruptures and the egg leaves the ovary, which then passes through the fallopian tube
What does the empty follicle that releases the egg become?
the corpus luteum
What is the placenta derived from?
endometrium & chorion (the outermost membrane that surrounds the embryo)
What hormone is produced by the placenta?
hCG (human chorionic gonadotropin)