True, nulliparity confers increased risk even in the absence of abortion, but abortion is also one way by which parity is artificially reduced. (firstthings.com)
It argues that nuns «should be free to use the contraceptive pill to protect against the hazards of nulliparity» — that is, heightened cancer risk among women who do not bear children. (religion.blogs.cnn.com)
Preference for home birth was associated with multiparity and indecision with nulliparity (Kruskal - Wallis, P = 0.040). (bjgp.org)