"Oops! I forgot to bring the extra diapers to the pool!" With the exception of Pam Anderson on Baywatch, most women wear one- pieces to cover up a less-than-perfect body or a post-baby tummy. How do you tell 'em apart? First, check that potential baby-mama's left hand for a ring. If she doesn't have one, you're not out of the woods yet. Stay alert for nearby toddlers screaming "Mommy" before you make your move.