Complex sentence: They are one of the several species of "Sceloporus" that are ovoviviparous, breeding occurs in the spring, and a litter of up to 11 young are born in mid-summer.
Split into simpler sentences: They are one of the several species of "Sceloporus" that are ovoviviparous. Breeding occurs in the spring, and a litter of up to 11 young are born in mid-summer.