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the more of less regular female fertility cycle beginning with the first day of menstruation and continuing for about a month until the next menstruation
a hormone produced by the ovaries that produces female sex characteristics and affects the menstrual cycle
thousands of feet of tiny tubes where meiosis makes head of sperm with 23 chromosomes instead of 46
a hormone which is secreated by the testicle in men and by the adrenal glans in men and women.
rootlike things that attache to the endometrium; blood dosnt mix but chemicals from the mom go into blood vessels in placenta
a sack to hold the amniotic fluid in; breaks before baby is about to be born; called "water broke"
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