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Union of an egg cell with a sperm during sexual reproduction inside the body of a parent; occurrence of internal insemination as the mode of combining sperm and egg.
By contrast, in some taxa with externalfertilization such as fish, exposure to semen promotes spawning behaviors.
Usage of internal fertilization in English
1
And internalfertilization can be a bit difficult if you don't have limbs to help you grasp your partner.
2
Like sharks the skeletons of chimaeras are composed of cartilage, and the males have claspers for internalfertilization of females.
3
The seminal plasma of some species with internalfertilization contains anti-aphrodisiac molecules that deter promiscuity in post-copulatory females, conferring fitness benefits to the ejaculating male.