High blood pressure more likely among frozen embryo pregnancies: study

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  • A Norwegian study published this month found that pregnant people who undergo frozen embryo transfers are more likely to develop hypertensive disorders during pregnancy.
  • One such disorder, preeclampsia, occurs after 20 weeks of pregnancy and can lead to swelling and protein in the urine.
  • Still, the researchers say most IVF-pregnancies (both fresh and frozen embryo transfers) are perfectly healthy.

Pregnant people who have undergone frozen embryo transfers may be more likely to develop high blood pressure during pregnancy, a Norwegian study published this month found.

Researchers included more than 4.5 million pregnancies, including some that were naturally conceived and those done via fresh or frozen embryo transfers. 

Participants were 20 to 44 years old and gave birth between 1988 and 2015.

Frozen embryo transfer pregnancies were 74% more likely to develop hypertensive disorders during pregnancy compared with those who conceived naturally. The findings were published in the peer-reviewed American Heart Association journal Hypertension.

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