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Updated: Jun 17, 2026

Ear Plaster Therapy as a Safe and Effective Treatment for Gestational Vomiting

Ear Plaster Therapy as a Safe and Effective Treatment for Gestational Vomiting

Published on: August 4, 2023

Herbal use before and during pregnancy.

Cheryl S Broussard¹, Carol Louik, Margaret A Honein

¹Epidemic Intelligence Service, Office of Workforce and Career Development, Division of Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA. gnp2@cdc.gov

American Journal of Obstetrics and Gynecology

|December 29, 2009

Summary

Approximately 10.9% of US women used herbal products before or during pregnancy, with use varying by state and demographics. Healthcare providers should discuss herbal product risks with patients.

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Published on: February 28, 2025

Area of Science:

Reproductive Health
Maternal Health
Herbal Medicine Research

Background:

Herbal product use during pregnancy is common but understudied.
Limited data exists on the prevalence and patterns of antenatal herbal product consumption.

Purpose of the Study:

To estimate the prevalence and patterns of herbal product use among US women before and during pregnancy.
To identify demographic and geographic factors associated with herbal product use in pregnancy.

Main Methods:

Analysis of data from the National Birth Defects Prevention Study, a population-based, case-control study.
Inclusion of 4239 women from 10 US centers who delivered infants without major birth defects between 1998 and 2004.

Main Results:

The prevalence of herbal product use was 10.9% in the 3 months before or during pregnancy, decreasing to 9.4% during pregnancy.
Herbal use was highest in the first trimester and associated with maternal age over 30 and education over 12 years.
Reported use varied significantly by state (5-17%), with ginger and ephedra common early in pregnancy, and teas and chamomile used throughout.

Conclusions:

An estimated 395,000 US births annually may involve antenatal exposure to herbal products.
Healthcare providers should routinely inquire about and educate patients on the potential risks of herbal product use during pregnancy.