For less premium expense, a Prospective Foal policy may be obtained separately from a Barrenness policy effective 42 days, or later, after conception, to insure the birth of a single live foal. The policy may also protect the insured against the birth of twins upon ultrasounds being performed on the mare showing she is in foal with a single fetus. Prospective Foal coverage is often obtained when buying a mare from public auction.