TY  - JOUR
A1  - Cheng, D.
A1  - Schwarz, E.B.
A1  - Douglas, E.
A1  - Horon, I.
T1  - Unintended pregnancy and associated maternal preconception, prenatal and postpartum behaviors
Y1  - 2009
DO  - 10.1016/j.contraception.2008.09.009
VL  - 79
IS  - 3

ER  -