Women who had miscarriages had no higher chances of getting Covid-19 vaccines in the prior 28 days than women who had not had miscarriages.
According to a new study, pregnant women who received at least one dose of the Covid-19 vaccination were not at higher risk of miscarriage than their unvaccinated peers.
Researchers from the Vaccine Safety Datalink (VSD), a cooperation between the Centers for Disease Control and Prevention (CDC) and nine health systems, looked at 105,446 women from December 15, 2020, to June 28, 2021, for the study, which was published in JAMA. There were 13,160 miscarriages among them, with 92,286 pregnancies still ongoing.
At least one dose of the Pfizer, Moderna, or Johnson & Johnson vaccination was given to 14.3% of the women. The researchers studied women who were six to 19 weeks pregnant and determined the ‘index date’ as the last day of the four-week observation period.
According to the Daily Mail, they discovered that women had got a Covid-19 vaccine 28 days before the index date in 8% of ongoing pregnancies and 8.6% of miscarriages. Furthermore, the proportion of women aged 35 to 49 who miscarried was higher than the proportion of women in the same age group who were still pregnant (38.7 percent vs 22.3 percent).
Overall, the researchers concluded that women who had miscarriages had no higher odds of obtaining Covid-19 vaccines in the prior 28 days than women who had not had miscarriages.
“Despite limitations, these data can be used to inform vaccine recommendations and to counsel patients,” Heather S. Lipkind, Obstetrics and Gynecology, Yale University in Connecticut said.
The findings came about a month after the Centers for Disease Control and Prevention (CDC) encouraged pregnant women to get the Covid-19 vaccine as soon as possible.
A team from the CDC looked at 2,456 pregnant women who had either the Pfizer-BioNTech or the Moderna Covid vaccine before 20 weeks of pregnancy as of July 19, 2021, using the agency’s smartphone tool V-SAFE, which follows persons who received Covid doses.
The study, which was published on the pre-print website Research Square, also looked at the risk of miscarriage, which was referred to as a “spontaneous abortion” in the study, according to the Daily Mail.
Miscarriages occurred in 11-16 percent of pregnancies, although the rate of miscarriage among women who received the Covid-19 vaccines was 12.8 percent, which is within the usual range. Furthermore, miscarriages ranged from 9.8% among those aged 20 to 29 to 28.8% among those aged 40 and older.
This is also in line with the evidence, which shows that women over the age of 35 have a higher risk of miscarriage, according to the paper.