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Related Experiment Videos

Smallpox vaccination during pregnancy.

S Naderi

    Obstetrics and Gynecology
    |August 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Smallpox vaccination during pregnancy is generally safe, but delaying it until the second or third trimester is recommended. Vaccination in the first trimester was linked to a higher incidence of clubfoot in newborns.

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    Area of Science:

    • Obstetrics and Gynecology
    • Vaccinology
    • Teratology

    Background:

    • Antenatal vaccination practices are crucial for maternal and infant health.
    • The safety of smallpox vaccination during pregnancy requires careful evaluation due to potential teratogenic risks.

    Purpose of the Study:

    • To assess the obstetric outcomes of pregnant patients who received smallpox vaccinations.
    • To compare pregnancy complications and congenital abnormalities between vaccinated and unvaccinated pregnant individuals.

    Main Methods:

    • A retrospective cohort study comparing 1522 vaccinated pregnant patients with 2024 unvaccinated controls.
    • Outcomes analyzed included abortions, stillbirths, prematurity, mature births, and congenital abnormalities.

    Main Results:

    Related Experiment Videos

    • Smallpox vaccination in previously vaccinated women did not elevate rates of stillbirths, premature births, or congenital abnormalities.
    • A notable association was observed between first-trimester smallpox vaccination and an increased incidence of clubfoot.

    Conclusions:

    • Smallpox vaccination during pregnancy is generally safe, particularly for women with prior vaccination history.
    • Delaying vaccination until the second or third trimester is advised unless there is an epidemic or immediate risk.
    • First-trimester vaccination may increase the risk of congenital clubfoot, warranting caution.