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The researchers looked at how many infants died before their first birthday after Texas adopted an abortion ban in September 2021. They compared infant deaths in Texas to those in 28 states — some also with restrictions. The researchers calculated that there were 216 more deaths in Texas than expected between March and December the next year.

In Texas, the 2022 mortality rate for infants went up 8% to 5.75 per 1,000 births, compared to a 2% increase in the rest of the U.S., according to the study in the journal JAMA Pediatrics.

Among causes of deaths, birth defects showed a 23% increase, compared to a decrease of about 3% in the rest of the U.S. The Texas law blocked abortions after the detection of cardiac activity, usually five or six weeks into pregnancy, well before tests are done to detect fetal abnormalities. Texas has since adopted a law that bans the procedure at any point in a pregnancy, except for when a pregnant patient has a life-threatening condition.

“I think these findings make clear the potentially devastating consequences that abortion bans can have,” said co-author Suzanne Bell, a fertility researcher.

have argued that the law is who face pregnancy complications, though the state’s Supreme Court last month rejected .

, Bell said, so the team was a bit surprised by the findings. Because of the small numbers, the researchers could not parse out the rates for different populations, for example, to see if rates were rising more for certain races or socioeconomic groups.

But the results did not come as a surprise to Tiffany Green, a University of Wisconsin-Madison economist and population health scientist who studies the consequences of racial inequities on reproductive health. She said the results were in line with earlier research . Many of the people getting abortions are vulnerable to pregnancy complications, said Green, who was not part of the research.

Stephen Chasen, a maternal-fetal medicine specialist with Weill Cornell Medicine, said abortion restrictions have other consequences. Chasen, who had no role in the research, said people who carry out pregnancies with fetal anomalies need extra support, education and specialized medical care for the mother and newborn — all of which require resources.

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This story was first published on Jun. 24, 2024. It was updated on Jul. 1, 2024. The original story reported the results of a study that analyzed infant mortality in Texas after the state passed a law that restricted access to abortion. The story should have made clear that Texas later passed another law that further restricted the procedure.

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