What is external fertilization?

External fertilization is a male organism’s sperm fertilizing a female organism’s egg outside of the female’s body. Internal fertilization, on the other hand, is the occurrence of internal insemination as the mode of combining sperm and egg. read more

In this study, I compare the mating systems of sympatric congeneric sessile solitary ascidians in the genus Corella that share habitats, life-history attributes, and morphology, but that differ in a key morphological attribute leading to internal fertilization and embryonic development in one species and external fertilization and development in the other (Table 1; G. read more

The difference between internal and external fertilization is that internal fertilization occurs inside the body, whereas external fertilization happens outside the body. Fertilization is the process by which a sperm cell and an egg cell unite to form a completely new individual. read more