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Contraceptive Pills and Twins

Published online by Cambridge University Press:  01 August 2014

Julia Métneki
Affiliation:
National Institute of Hygiene, Budapest
Andrew Czeizel*
Affiliation:
National Institute of Hygiene, Budapest
*
National Institute of Hygiene, Gyali ut 2-6, H-1966 Budapest, Hungary

Abstract

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Neither the percentage in the previous use of contraceptive pills nor the distribution of the time interval between the discontinuation of the pill and conception has shown any significant difference in twins and control singletons. Twin conception within one month after discontinuation of the norethynodrel type pill, however, was significantly more frequent, whereas after the use of the linestrenol type, it was lower.

Type
Short Note
Copyright
Copyright © The International Society for Twin Studies 1980

References

1.Bracken, MB 1979: Oral contraception and twinning: An epidemiologic study. Am J Obstet Gynecol 133:432434.CrossRefGoogle Scholar
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7.Sárkány, J, Gorácz, G, Ágoston, J, Czeizel, E 1975: Oral contraceptive use and twinning in the Budapest Twin Register (Hungarian) Magy. Nöorv Lap 38:603608.Google Scholar
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9.Watts, GF, Diddle, AW, Gardner, WHet al (1964): Pregnancy following withdrawal from oral contraceptive measures. Am J Obstet Gynecol 90:401403.Google Scholar
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