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Related Experiment Video

Updated: May 21, 2026

Screening for Phytoestrogens using a Cell-based Estrogen Receptor β Reporter Assay

Screening for Phytoestrogens using a Cell-based Estrogen Receptor β Reporter Assay

Published on: June 7, 2020

Phytoestrogens in human pregnancy.

John Jarrell¹, Warren G Foster, David W Kinniburgh

¹Department of Obstetrics and Gynecology, University of Calgary, 1403 29 NW Street, Calgary, AB, Canada T2N 2T9.

Obstetrics and Gynecology International

|June 8, 2012

Summary

This summary is machine-generated.

Phytoestrogens are common in pregnant women, with higher levels found in amniotic fluid of female fetuses. Soy intake increases fetal exposure, but concentrations are unrelated to pregnancy complications.

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Area of Science:

Endocrinology
Developmental Biology
Environmental Health

Background:

Pregnancy's hormonal environment influences long-term health.
Phytoestrogens, plant compounds with hormonal activity, may affect reproduction.
Developmental exposure to phytoestrogens is not well understood.

Purpose of the Study:

Quantify phytoestrogen (daidzein and genistein) exposure during pregnancy and lactation.
Investigate factors influencing phytoestrogen levels in pregnant women and fetuses.
Examine the relationship between phytoestrogen exposure and pregnancy outcomes.

Main Methods:

Recruited pregnant women undergoing genetic amniocentesis.
Collected amniotic fluid, maternal blood, umbilical cord blood, and breast milk samples.
Measured daidzein and genistein concentrations using GC Mass Spectroscopy.
Administered environmental questionnaires to assess soy intake.

Main Results:

Phytoestrogens were detected in maternal serum, amniotic fluid, and cord blood.
Amniotic fluid showed higher phytoestrogen levels in female fetuses compared to males.
Maternal serum phytoestrogen levels did not differ by fetal sex.
Soy ingestion significantly increased amniotic fluid phytoestrogen concentrations.
Phytoestrogen levels were not associated with common pregnancy complications or infertility.

Conclusions:

Pregnant women and their fetuses are exposed to phytoestrogens.
Fetal sex influences phytoestrogen accumulation in amniotic fluid.
Dietary soy intake is a significant source of fetal phytoestrogen exposure.
Phytoestrogen exposure during pregnancy does not appear linked to common complications.