Sex Ratio Associated with Natural Family Planning
Author:
Publisher
Elsevier BV
Subject
Obstetrics and Gynaecology,Reproductive Medicine
Reference9 articles.
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2. Williams Obstetrics;Pritchard,1980
3. Sex of offspring of women using oral contraceptives, rhythm, and other methods of birth control around the time of conception;Shiono;Fertil Steril,1982
4. A prospective multicentre study of the ovulation method of natural family planning. IV. The. outcome of pregnancy;World Health Organization;Fertil Steril,1984
5. Association of the type and time of insemination within the menstrual cycle with the human sex ratio at birth;Guerrero;N Engl J Med,1974
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