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Related Experiment Videos

Amniotic fluid androgens and estrogens in midgestation.

J D Robinson, H L Judd, P E Young

    The Journal of Clinical Endocrinology and Metabolism
    |October 1, 1977
    PubMed
    Summary

    Fetal sex can be identified by measuring amniotic fluid hormones. Male fetuses show higher testosterone and androstenedione levels, while female fetuses have higher estradiol, indicating early sex-specific hormone secretion.

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    Area of Science:

    • Reproductive Endocrinology
    • Developmental Biology
    • Fetal Medicine

    Background:

    • Hormonal profiles in fetal development are crucial for understanding sexual differentiation.
    • Amniotic fluid serves as a valuable medium for assessing fetal endocrine activity.

    Purpose of the Study:

    • To investigate sex-specific differences in amniotic fluid androgen and estrogen levels during mid-gestation.
    • To explore the potential of these hormone levels as markers for fetal sex determination.

    Main Methods:

    • Measurement of amniotic fluid testosterone, androstenedione, dehydroepiandrosterone, estrone, and estradiol.
    • Analysis of samples from 48 male and 72 female fetuses between 14 and 20 weeks of gestation.

    Main Results:

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    • Significantly higher amniotic fluid testosterone and androstenedione levels in male fetuses compared to female fetuses, with no overlap in testosterone values.
    • No significant difference in dehydroepiandrosterone levels between sexes.
    • Significantly higher estradiol levels in female fetuses, suggesting early ovarian activity.

    Conclusions:

    • Amniotic fluid testosterone and androstenedione levels are reliable indicators of male fetal testicular secretion.
    • Elevated amniotic fluid estradiol in female fetuses suggests early ovarian secretion.
    • These findings support the use of amniotic fluid hormone analysis for assessing fetal endocrine development and sex differentiation.