Compared to unvaccinated women, women vaccinated for COVID-19 have a slightly higher risk of a heavier period after vaccination, suggests a study funded by the National Institutes of Health. However, flow returns to normal in the next menstrual period.
News
NICHD issues News Releases and Media Advisories to the news media. Spotlight and Research Feature articles explain NICHD research findings and public health issues to the general public. An Item of Interest is a short announcement of relevant information, such as a notable staff change.
Selected NICHD Research Advances of 2022
Read about NICHD’s research findings and activities from 2022.
Release: Study confirms link between COVID-19 vaccination and temporary increase in menstrual cycle length
A large international study has confirmed the findings of a previous U.S. study that linked COVID-19 vaccination with an average increase in menstrual cycle length of less than one day. The increase was not associated with any change in the number of days of menses (days of bleeding). Funded by the National Institutes of Health, the new study included data from nearly 20,000 people from Canada, the United Kingdom, the United States, Europe and other parts of the world who received any of nine different vaccines. For most study participants, the increase resolved in the cycle following vaccination.
Spotlight: Selected NICHD Research Advances of 2021
Read about NICHD’s research findings and activities from 2021.
Release: COVID-19 vaccination associated with a small, temporary increase in menstrual cycle length, suggests NIH-funded study
Women receiving one dose of a COVID-19 vaccine during a single menstrual cycle had an increase in cycle length of nearly one day, according to an NIH-funded study.
Director's Corner: Menstrual Cycles as a Fifth Vital Sign
NICHD Director Dr. Diana W. Bianchi explains how menstruation provides insights into overall health status and encourages clinical researchers to routinely collect menstrual cycle data.
Item of Interest: NIH funds studies to assess potential effects of COVID-19 vaccination on menstruation
NIH has awarded one-year supplemental grants to five institutions to explore potential links between COVID-19 vaccination and menstrual changes.
Spotlight: Selected NICHD Research Advances of 2020
Read about NICHD’s research findings and activities from 2020.
Spotlight: Boosting women’s health by supporting menstruation research
NICHD has supported gynecologic and reproductive health research for decades. Learn more about its leading role in menstruation research.
Release: Pregnancy, breastfeeding may lower risk of early menopause, NIH-funded study suggests
Women who breastfed their infants exclusively for 7 to 12 months may have a significantly lower risk of early menopause than their peers who breastfed their infants for less than a month, according to an analysis funded by the National Institutes of Health.
Science Update: Fragile X carriers may be at higher risk for several health conditions, NIH-funded study suggests
Carriers of the FMR1 premutation—a mutation in the gene associated with the developmental disorder Fragile X syndrome—may have a higher risk for several health conditions, according to an analysis funded by the National Institutes of Health.
Media Advisory: NICHD chronicles its major research advances of 2018
As 2018 winds down, a new slideshow highlights a selection of initiatives, therapies, and scientific advances supported by NIH’s Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD).
Spotlight: Selected NICHD Research Advances of 2018
In 2018, researchers funded by NICHD made significant progress in advancing the health and well-being of infants, children, teenagers, and adults across the United States and around the world.
Podcast: Menstruation as a Diagnostic Tool for Women’s Health
Dr. Candace Tingen with NICHD’s Gynecological Health and Disease Branch speaks about the possibilities of tapping a woman’s menstrual cycle for signs of disease. Listen to our latest podcast.
Item of Interest: NICHD announces gynecologic health and disease research themes and scientific vision
The Gynecologic Health and Disease Branch recently published its scientific vision. The document summarizes its research themes, which provide direction for future research.
Science Update: Diets low in certain minerals linked to problem with ovulation
Insufficient sodium or manganese increases risk, NIH study suggests
Spotlight: What to Know About Endometriosis
Understanding endometriosis, causes and treatment, is part of NICHD’s mission. Learn more about signs and symptoms.
Spotlight: Selected NICHD Research Advances of 2017
Over the past year, NICHD contributed to numerous scientific advances and key initiatives.
Getting to Know the New NICHD Director
NICHD Director Dr. Diana Bianchi shares some thoughts about joining NICHD.
Some women with PCOS may have adrenal disorder, NIH researchers suggest
A subgroup of women with polycystic ovary syndrome (PCOS), a leading cause of infertility, may produce excess adrenal hormones, according to an early study by researchers at the National Institutes of Health and other institutions.
BACK TO TOP