Preventing unintended pregnancy: let us count the ways.
Trussell
James
J
Office of Population Research, Princeton University, Princeton, NJ 08540, USA. Trussell@princeton.edu
Raymond
Elizabeth G
EG
D003281:Contraceptives, Postcoital; D005260:Female; D006293:Health Promotion; D006801:Humans; D011247:Pregnancy; D012606:Scotland
D003281:Contraceptives, Postcoital