CD4 and mitochondrial DNA depletion syndrome 4a: Otherlimitation of this study is due to the fact that since March 2019, repeated CD4+cell counts measurements were only performed in women with suspicion of AHD,and therefore, in the lastyear of the study, the proportion of women with a “less than expectedimprovement in CD4+ cell counts” after the first ANC visit mayhave been overestimated.