What is the typical reproductive strategy observed in the majority of species within the Viperinae subfamily?

Answer

Ovoviviparous

Most species belonging to the Viperinae subfamily employ an ovoviviparous reproductive strategy, meaning the eggs are retained inside the mother until the young are ready to be born live.

What is the typical reproductive strategy observed in the majority of species within the Viperinae subfamily?
classificationreptilesnakeviper