TY - GEN AU - Johnson,S C AU - Solomon,G E TI - Why dogs have puppies and cats have kittens: the role of birth in young children's understanding of biological origins SN - 0009-3920 PY - 1997///0916 KW - Age Factors KW - Animal Population Groups KW - Animals KW - Child KW - Child Development KW - Child, Preschool KW - Cognition KW - Female KW - Humans KW - Labor, Obstetric KW - Pregnancy KW - Psychology, Child N1 - Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S ER -