The amount of larvae produced is dependent on the maternal oyster's size and the amount of reserved nutrients she has at the time of egg fertilization.
Dunkleosteus, together with most other placoderms, may have also been among the first vertebrates to internalize egg fertilization, as seen in some modern sharks.
The Seven-arm Octopus gets its name because the male's hectocotylus (a specially modified arm used in egg fertilization) is coiled in a sac beneath the right eye.
The method of egg fertilization is currently unknown.
The traditional IUD is a small, T-shaped plastic device that's inserted into the uterus to block egg fertilization.
After ovulation, egg fertilization usually happens in a fallopian tube.
Calcium governs cell division and egg fertilization.