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Related Experiment Videos

Oral contraceptives and birth defects.

K J Rothman, C Louik

    The New England Journal of Medicine
    |September 7, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Oral contraceptives (OCs) do not pose a major teratogenic risk. While minor malformations were slightly higher in infants exposed shortly before conception, major birth defects showed no significant difference, suggesting OCs are generally safe.

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    Area of Science:

    • Reproductive Health
    • Teratology
    • Perinatal Epidemiology

    Background:

    • Concerns exist regarding the potential teratogenic effects of oral contraceptives (OCs).
    • Understanding the risks associated with OC use shortly before conception is crucial for public health.
    • Previous studies have yielded conflicting results on the safety of OCs during early pregnancy.

    Purpose of the Study:

    • To investigate the association between maternal oral contraceptive use shortly before conception and infant malformations.
    • To determine if oral contraceptive exposure poses a significant teratogenic hazard.
    • To compare malformation rates in infants exposed to OCs versus those not exposed.

    Main Methods:

    • Retrospective review of birth certificates and hospital records for 7723 infants.

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  • Categorization of infants based on maternal oral contraceptive use patterns prior to conception.
  • Statistical analysis to compare malformation frequencies and calculate prevalence ratios with confidence intervals.

    • Main Results:

    • Overall malformation frequency was 4.3% in infants whose mothers used OCs shortly before conception, versus 3.3% in controls (prevalence ratio 1.0-1.7).
    • No significant difference was observed in the prevalence of major malformations between the groups.
    • A slight excess of minor malformations, including undescended testis, was noted in the exposed group but could be attributed to sampling variability.

    Conclusions:

    • Oral contraceptives do not appear to present a major teratogenic hazard.
    • The observed slight increase in minor malformations warrants further investigation but does not indicate a significant risk.
    • Current data suggest that oral contraceptive use shortly before conception is generally safe regarding major congenital anomalies.