Sperm Activity during Fertilization

Usually mammals rely on internal fertilisation through copulation. After a male ejaculates, a large number of sperm cells move to the upper vagina (via contractions from the vagina) through the cervix and across the length of the uterus toward the ovum.

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Tags: fertilization

Uploaded by: ( Send Message ) on 28-11-2011.

Duration: 4m 20s