Page 7 - Nerve activates contraction

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 A male usually ejaculates about 2 – 5 mL of semen, each

milliliter containing about 50 – 130 million sperm.

 Once in the female reproductive tract:

 Prostaglandins in semen thin the mucus at the

opening of the uterus and stimulate uterine

contractions

 When ejaculated semen coagulates:

 This makes it easier for uterine contractions to

move it along.

 Anticoagulants liquefy the semen and the sperm

begin swimming.

 The alkalinity of semen helps neutralize the acidic

environment of the vagina.

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