title: On the efficacy of withdrawal.
authors.forename: J
authors.initials: J
authors.lastname: Trussell
mesh_terms: D003076:Coitus Interruptus; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007231:Infant, Newborn; D015993:Life Tables; D011247:Pregnancy; D011336:Probability