Litter Sizes - Anatomy & Physiology

Litter sizes vary considerably between species.

Polytocous Species

Species that produce multiple offspring.

• Bitch
• Queen
• Sow
• Rabbit
• Ewe

Monotocous species

Those species that normally produce a single offspring. Twin pregnancies do occur in the mare but are rarely carried to full term and veterinary intervention is often used to prevent twin pregnancies in this species.

• Mare
• Cow