Semen contains prostaglandins which is what causes the uterine contractions... the cervix strips this stuff out so that only the sperm itself are released into the uterus. Semen in the uterus is very bad, sperm in the uterus is great.
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Semen contains prostaglandins which is what causes the uterine contractions... the cervix strips this stuff out so that only the sperm itself are released into the uterus. Semen in the uterus is very bad, sperm in the uterus is great.
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ah interesting thanks
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