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Rh Immunoglobulin Unnecessary After First-Trimester Abortion

ByThe Short Paper

Induced Abortion and the Risk of Rh Sensitization

A study involving 506 individuals undergoing induced first-trimester abortion found that almost all participants (99.8%) had fetal red blood cell counts below the threshold for Rh sensitization after the procedure. This suggests that Rh testing or immunoglobulin administration following induced first-trimester abortion is unnecessary.

Horvath S, Huang Z, Koelper NC, et al. Induced Abortion and the Risk of Rh Sensitization. JAMA. 2023;330(12):1167–1174. doi:10.1001/jama.2023.16953

https://jamanetwork.com/journals/jama/article-abstract/2809809

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