How many babies can a timber rattlesnakes have?

All true rattlesnake species (of the genus Crotalus) and all pygmy rattlesnake species (of the genus Sistrurus) are ovoviviparous, meaning that they retain embryos in egg-sacks that are retained within the mother's body until they are fully developed. Ovoviviparous animals DO NOT LAY eggs, they give birth to LIVE young. Crotalus horridus (the Timber Rattlesnake) is ovoviviparous, and gives birth to LIVE young, and does not lay eggs.

In my experience, females will give birth to anywhere between four to eighteen live young. I have had litters as big as 22, but I would say that the average is probably somewhere around nine.