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Women receiving lopinavir/ritonavir (LPV/r)–based combination antiretroviral therapy (cART) have higher plasma estradiol in comparison with women receiving efavirenz (EFV)–based cART. Loge-transformed levels of plasma progesterone (A) and estradiol (B) across pregnancy in human immunodeficiency virus–infected women receiving EFV or LPV/r-based cART.
