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Published in: Current Obstetrics and Gynecology Reports 3/2019

01-09-2019 | Intrauterine Growth Restriction | Environmental Exposures and Pregnancy Outcomes (N Grindler, Section Editor)

Paternal Environmental Toxicant Exposure and Risk of Adverse Pregnancy Outcomes

Authors: Kaylon L. Bruner-Tran, Shilpa Mokshagundam, Alison Barlow, Tianbing Ding, Kevin G. Osteen

Published in: Current Obstetrics and Gynecology Reports | Issue 3/2019

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Abstract

Purpose of Review

Current clinical efforts to predict and prevent preterm birth are primarily focused on the mother and have made minimal progress in improving outcomes. However, recent data indicate that paternal factors can also influence timing of birth. Herein, we will review recent human and murine data examining the contribution of the father to pregnancy outcomes with an emphasis on environmental exposures that can negatively impact fertility and the timing of birth.

Recent Findings

Human epidemiology studies now clearly indicate that a variety of paternal factors (age, race, weight, smoking status) can influence sperm quality, birth timing and, in some studies, offspring health. Utilizing a mouse model, our data have demonstrated that developmental exposure of the male to the environmental toxicant TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin) is associated with a transgenerational reduction in sperm number and quality and an increased risk of preterm birth in an unexposed partner.

Summary

Toxicant exposure history can clearly influence sperm quality in men and mice. Murine data further indicate that exposures which negatively affect sperm quality also impair placental function, potentially leading to preterm birth and other adverse outcomes. Of particular concern, these changes have been linked to epigenetic alterations within the male germ cell which can then be transmitted across multiple generations. Since it is not possible to prevent an ancestral toxicant exposure in a human population, identifying lifestyle modifications that can be implemented during the preconception period to improve sperm quality should be explored for the therapeutic potential to reduce the incidence of PTB and its sequelae.
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Metadata
Title
Paternal Environmental Toxicant Exposure and Risk of Adverse Pregnancy Outcomes
Authors
Kaylon L. Bruner-Tran
Shilpa Mokshagundam
Alison Barlow
Tianbing Ding
Kevin G. Osteen
Publication date
01-09-2019
Publisher
Springer US
Published in
Current Obstetrics and Gynecology Reports / Issue 3/2019
Electronic ISSN: 2161-3303
DOI
https://doi.org/10.1007/s13669-019-00265-w

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