Related Experiment Video
Updated: Sep 10, 2025

A Method to Study the Impact of Chemically-induced Ovarian Failure on Exercise Capacity and Cardiac Adaptation in Mice
Published on: April 7, 2014
Menstrual Disorders Following Covid 19 Vaccination in Women of Reproductive Age and Post-Menopause. A Systematic
Farideh Pargar1, Zeinab Rabiei2, Afsaneh Keramat3
1Student Research Committee, School of Nursing and Midwifery Shahroud University of Medical Sciences Shahroud Iran.
Background:
During the coronavirus pandemic, several factors such as stress, depression, infection, and vaccination against the COVID-19 virus have caused changes in the menstrual cycle.
Objective & Aims:
This systematic review intended to provide a comprehensive interpretation of the changes in the menstrual cycle of women of reproductive age and menopause after coronavirus vaccination. Method: Electronic databases, including Web of Science, PubMed, Scopus, ScienceDirect, ProQuest, Cochrane, SAGE, Springer, Google Scholar, and CINHAL were searched for published studies from March 2020 to June 2023. Of the 682 references identified in the initial search, 27 studies met the inclusion criteria.
Results:
The results of this systematic review showed that COVID-19 vaccination is associated with a wide range of menstrual disorders in women of reproductive age and postmenopausal women. The most commonly reported disorders were menorrhagia, delayed menstruation, changes in menstrual cycle length, spotting between periods, and increased bleeding volume. In postmenopausal women, complications such as spotting and resumption of bleeding were also observed. Although the prevalence and incidence of each disorder varied across studies, these findings suggest that vaccination can lead to changes in the menstrual cycle.
Conclusion:
COVID-19 vaccination may lead to menstrual disorders in women of reproductive and postmenopausal age, which can cause concern and reduce social and psychological quality of life. However, these effects are usually temporary and transient, resolving after a few menstrual cycles. Further studies are needed to investigate the possible mechanisms of this association and identify associated risk factors.
Related Concept Videos
Disorders of the Female Reproductive System
Hormonal Regulation of the Menstrual Cycle
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH...
Menopause
Hormonal Regulation
The Menstrual Cycle
The menstrual phase occurs from days 1 to 5 and involves the shedding of the stratum functionalis, as a...
Hormonal Control of the Ovarian Cycle
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...

