Sharks are ovoviviparous -- that is, they bring forth living young instead of eggs.    From Wordnik.com.  [Book Randomness Tag!] Reference

Coenogonous: oviparous at one season of the year, ovoviviparous at another, as in Aphididae.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

I don't see that they'd be ovoviviparous ... too much weight for the mother if she had to carry her young for any length of time.    From Wordnik.com.  [Dinosaur Planet]

The types of vipers that are ovoviviparous include Bitis, Echis carinatus, and most Vipera.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference

Over 20 oviparous specifically expressed genes were identified through screening the subtracted cDNA library enriched between oviparous and ovoviviparous.    From Wordnik.com.  [Journal of Biological Chemistry current issue] Reference

And yes, ovoviviparous is the word.    From Wordnik.com.  [Book Randomness Tag!] Reference

Garter snakes are ovoviviparous.    From Wordnik.com.  [The Albert Lea Tribune] Reference