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Letter: Oral contraception and sex ratio. 1974

E Ron, and J L Kelsey

UI MeSH Term Description Entries
D008297 Male Males
D003276 Contraceptives, Oral Compounds, usually hormonal, taken orally in order to block ovulation and prevent the occurrence of pregnancy. The hormones are generally estrogen or progesterone or both. Low-Dose Oral Contraceptive,Oral Contraceptive,Oral Contraceptives,Oral Contraceptives, Low-Dose,Oral Contraceptives, Phasic,Contraceptive, Low-Dose Oral,Contraceptive, Oral,Contraceptives, Low-Dose Oral,Contraceptives, Phasic Oral,Low Dose Oral Contraceptive,Low-Dose Oral Contraceptives,Oral Contraceptive, Low-Dose,Oral Contraceptives, Low Dose,Phasic Oral Contraceptives
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012744 Sex Ratio The number of males per 100 females. Ratio, Sex,Ratios, Sex,Sex Ratios
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor

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