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Exogenous progestogen and estrogen implicated in birth defects.

J J Nora, A H Nora, J Blu

    JAMA
    |September 1, 1978
    PubMed
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    Exposure to female sex hormones during pregnancy may increase the risk of birth defects in infants. This study found higher risks for VACTERL anomalies and congenital heart defects in infants exposed to hormones.

    Area of Science:

    • Teratology
    • Reproductive Toxicology
    • Pediatric Health

    Background:

    • Exogenous female sex hormones have been historically prescribed during pregnancy.
    • Potential teratogenic effects of these hormones require thorough investigation.
    • Understanding the risks associated with prenatal hormone exposure is crucial for public health.

    Purpose of the Study:

    • To investigate the potential teratogenicity of exogenous female sex hormones.
    • To quantify the association between maternal hormonal exposure and specific infant malformations.
    • To evaluate risks for VACTERL anomalies, congenital heart lesions, and neurological disorders.

    Main Methods:

    • A five-year study incorporating three case-control studies and one cohort study.
    • Case-control analysis comparing infants with major anomalies to controls regarding maternal hormonal exposure.

    Related Experiment Videos

  • Prospective study assessing malformations in relation to hormonal exposure rates over time.

    • Main Results:

    • A relative risk (RR) of 8.41 was found for maternal hormonal exposure in infants with VACTERL anomalies (P < .001).
    • Two case-control studies reported RRs of 5.58 (P = .017) and 3.35 (P < .001) for congenital heart lesions.
    • A prospective study indicated increased risks for major malformations (RR = 2.75), heart anomalies (RR = 6), and neural tube defects.

    Conclusions:

    • Maternal exposure to exogenous female sex hormones is associated with an increased risk of major infant malformations, including VACTERL anomalies and congenital heart defects.
    • The findings suggest a teratogenic potential of these hormones, necessitating caution in their use during pregnancy.
    • Further research is warranted to elucidate specific hormonal mechanisms and refine risk assessments.