Scientific bases for NFP beyond question.
Kippley
J F
JF
D001519:Behavior; D019411:Clinical Laboratory Techniques; D003075:Coitus; D003710:Demography; D003933:Diagnosis; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005306:Fertilization; D010060:Ovulation; D010061:Ovulation Detection; D011153:Population; D011157:Population Dynamics; D012098:Reproduction; D012725:Sexual Behavior; D013997:Time Factors
Behavior; Coital Frequency; Critique; Demographic Factors; Examinations And Diagnoses; Family Planning; Family Planning, Behavioral Methods; Fertilization; Laboratory Examinations And Diagnoses; Laboratory Procedures; Natural Family Planning; Ovulation; Ovulation Detection; Population; Population Dynamics; Reproduction; Sex Behavior; Time Factors