Answer:
Feminization
in human beings the sperms made in the testis of males are introduced into the
vagina of the woman through penis during copulation or mating. The sperms are
highly active and mobile and thus move up through cervix into the uterus. From
uterus, sperms pass into the oviducts. The oviduct contains an ovum released by
the ovary during ovulation.
Millions of sperms are released into the vagina at one time, but only one
sperm fuses with the ovum in the oviduct to form a zygote. This is called fertilization.
Fertilization can occur only once in a month because the
ovary releases just one mature egg every month during a menstrual cycle (around
14th day).
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