Boa constrictor

They are oviparous. Pregnancy lasts 100 to 120 days and litter size varies greatly.

An excerpt from the article 17 facts about Boa constrictor

There can be anywhere from 10 to 65 young (25 on average), some of which are unhatched or unfertilized eggs. Young Boa constrictors are between 38 and 51 cm long at birth.

The vast majority of these snakes reproduce sexually, although hermaphroditic reproduction has been observed.