Natural family planning: very risky business.
Hughes
J
J
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Americas; Attitude; Basal Body Temperature Method; Behavior; Biology; Catholicism; Cervical Mucus Method; Christianity; Conservatism; Contraception; Contraception Failure; Contraceptive Effectiveness; Contraceptive Usage; Cost Benefit Analysis; Demographic Factors; Developed Countries; Developing Countries; Family Planning; Family Planning Education; Family Planning, Behavioral Methods; Fertility; Husband-wife Communication; Literature Review; Natural Family Planning; North America; Northern America; Opposition To Family Planning; Policy; Political Factors; Population; Population Dynamics; Population Policy; Pronatalist Policy; Psychological Factors; Religion; Reproductive Behavior; Rhythm Method, Calendar; Risk Factors; Social Policy; Sympto-thermal Method; Theoretical Effectiveness; United States