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Related Experiment Videos

Fertility and ageing.

D T Baird, J Collins, J Egozcue

    Human Reproduction Update
    |April 16, 2005
    PubMed
    Summary
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    Delayed childbirth increases age-related infertility risks. Female fertility declines significantly in the mid-30s due to oocyte quality and quantity loss, impacting conception and pregnancy outcomes.

    Area of Science:

    • Reproductive biology
    • Gerontology
    • Obstetrics and Gynecology

    Background:

    • Delayed childbirth is a growing trend, leading to increased age-related infertility.
    • Female reproductive capacity naturally declines with age, particularly after the mid-30s.
    • Male reproductive function also declines with age, though less significantly than female fecundity.

    Purpose of the Study:

    • To investigate the factors contributing to age-related decline in fecundity.
    • To explore methods for predicting reproductive capacity.
    • To examine the consequences of advanced maternal age on pregnancy and childbirth outcomes.

    Main Methods:

    • Review of existing literature on female and male reproductive aging.
    • Analysis of oocyte quantity and quality changes with age, including aneuploidy.

    Related Experiment Videos

  • Evaluation of semen parameters and intercourse frequency in relation to conception rates.
  • Assessment of age as a predictor for conception, including assisted reproductive technology (ART).

    • Main Results:

    • Female fecundity declines notably in the mid-30s due to decreased oocyte number and quality (e.g., aneuploidy).
    • Male age impacts conception likelihood, but sperm quality is less critical than intercourse frequency.
    • Age is a reliable predictor of conception success, even with ART.
    • Pregnancies in women over 40 face higher risks of complications, premature birth, and congenital malformations.

    Conclusions:

    • Delaying childbirth significantly increases infertility risks due to age-related declines in female reproductive capacity.
    • Even ART may not fully overcome reduced fecundity in older women.
    • Advanced maternal age (over 40) is associated with increased pregnancy complications and adverse birth outcomes.