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Related Experiment Videos

Delayed childbearing in Sweden.

M R Forman, O Meirik, H W Berendes

    JAMA
    |December 14, 1984
    PubMed
    Summary

    Older maternal age, particularly 35-39 years, significantly increases risks for late fetal deaths and adverse birth outcomes like low birth weight and preterm birth, even for first or second pregnancies.

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    Area of Science:

    • Reproductive Health
    • Maternal-Fetal Medicine
    • Epidemiology

    Background:

    • Delayed childbearing is an increasing global trend.
    • Understanding the impact of maternal age and reproductive history on pregnancy outcomes is crucial.
    • Previous research has indicated potential risks associated with advanced maternal age.

    Purpose of the Study:

    • To investigate the influence of reproductive history on pregnancy outcomes in women aged 30-39 years.
    • To compare risks of adverse outcomes between older mothers and a younger control group (20-24 years).

    Main Methods:

    • Retrospective cohort study using data from the Swedish Medical Birth Registry (1976-1980).
    • Analysis of pregnancy outcomes for women aged 30-39 giving birth to their first or second child.
    • Classification into groups based on gravidity and parity (primigravida, gravida 2 para 0, gravida 2 para 1).

    Main Results:

    • Significantly higher relative risk (RR) of late fetal deaths observed in women aged 35-39 compared to younger controls (RR 1.76-2.39).
    • Increased risk of low birth weight (LBW) newborns (preterm or term) and high-birth-weight preterm infants among women aged 30-39.
    • Risk escalated with advancing maternal age (30-34 vs. 35-39) and increased parity-gravidity.

    Conclusions:

    • Advanced maternal age (30-39 years) is associated with elevated risks of late fetal death and adverse birth outcomes.
    • Reproductive history, including parity and gravidity, modifies these age-related risks.
    • Findings highlight the need for increased awareness and monitoring for older women undergoing delayed childbearing.

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