Video: The reason some snakes give birth instead of laying eggs

Not all snakes lay eggs. Snakes have 3 forms of reproduction: oviparous, and ovoviviparous.

Snake has three forms of reproduction.

Pregnancy ovarian or ovarian form is a form of reproduction in animals that the embryo develops within the egg. Eggs are kept in the mother's solid body until they hatch. The mother's offspring but not because they are pregnant but because the egg after fertilization is in the fallopian tube until it hatches into a baby.

In nature, about 70% of snakes lay eggs, why do snakes have egg-laying species, and species?

The reason is due to the difference of the living environment.

In cold climates, the ground is not warm enough to hatch eggs, so some snakes reproduce by laying babies or laying eggs.