One of the first studies to track whether COVID-19 vaccination could affect female physiology found small transient changes.
A study released Wednesday tracked nearly 4,000 U.S. women over six menstrual cycles and an average of the next menstrual cycle. Limit After the shot started about a day later than usual. However, there was no change in the number of days of menstrual bleeding after COVID-19 vaccination.
“This is very encouraging,” said Dr. Allison Edelman of Oregon Health & Science University, who said it was important to lead the study and tell women what to expect.
Some women report irregular periods or other menstrual changes after the shot. The National Institutes of Health is funding research to find out if there is a link.
Edelman’s team Contraceptive app Called the Natural Cycle, it is approved by the Food and Drug Administration to track a woman’s menstrual cycle and to know when she is most likely to become pregnant.
The menstrual cycle counts from the first day of a period to the next. Small monthly fluctuations are normal and can spur temporary changes in stress, diet, and even exercise.
According to Edelman, the study included women with an average of 24-38 days in the “most normal” cycle. The researchers followed vaccinated females for three cycles, including the month before injection and the month immediately after receiving the dose, and compared them to unvaccinated females.The app encouraged women to join Vaccine information..
A subset of 358 females who received the same and both vaccines Menstrual cycle The length of the next cycle changed slightly significantly over two days on average.Approximately 10% of them changed for more than 8 days, but then returned to the normal range, the researchers reported in the journal. Obstetrics and gynecology..
Whether she has a change in the weight of menstrual bleeding, or woman People with irregular menstruation respond differently.
The findings provide “important new evidence highlighting the minimal and temporary effects of the COVID vaccine on menstruation,” Dr. Christopher Zahn of the American College of Obstetrics and Gynecology said in a statement. ..
Edelman, A. et al. Relationship between menstrual cycle length and coronavirus disease 2019 (COVID-19) vaccination: US cohort. Obstetrics and gynecology (2022). DOI: 10.1097 / AOG.0000000000004695
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