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Amniotic fluid testosterone in prenatal sex determination
Journal De Genetique Humaine
|December 1, 1981
Summary
Amniotic fluid testosterone levels are significantly higher in male fetuses compared to female fetuses. This finding suggests amniotic testosterone may help determine fetal sex during pregnancy.
Area of Science:
- Reproductive biology
- Endocrinology
- Prenatal diagnostics
Background:
- Fetal sex determination is crucial for understanding developmental trajectories.
- Hormonal profiles during gestation can offer insights into fetal development.
- Nonconjugated testosterone is a key androgen influencing sexual differentiation.
Purpose of the Study:
- To investigate differences in amniotic fluid testosterone levels between male and female fetuses.
- To assess the potential of amniotic testosterone as a biomarker for fetal sex determination.
Main Methods:
- Radioimmunoassay (RIA) was used to measure nonconjugated testosterone levels.
- Amniotic fluid samples were collected from 60 normal pregnant women (15-32 weeks gestation).
- Statistical analysis was performed to compare testosterone concentrations between male and female fetuses.
Main Results:
- Mean amniotic fluid testosterone levels were significantly higher in male fetuses (328 +/- 25 pg/ml) than in female fetuses (121 +/- 9 pg/ml) (p < 0.001).
- Observed ranges showed some overlap between sexes (155-730 pg/ml for males, 46-240 pg/ml for females).
- An overlap area was noted between 155-240 pg/ml.
Conclusions:
- Amniotic fluid testosterone levels exhibit a significant sex-based difference in fetuses.
- Amniotic testosterone shows potential as a non-invasive marker for fetal sex determination.
- Further research may validate amniotic testosterone for routine prenatal sex assessment.