RESULTS: Use of PMTCT services was less common than use of prenatal care services among HIV-positive female adolescents (67% of pregnancies vs. 84%). These adolescents made four or more prenatal care visits in only 45% of pregnancies. In addition, use of skilled care during or after abortion or miscarriage was low (20%). The odds of receiving PMTCT services and skilled assistance were higher in Nairobi than in other regions (odds ratios, 3.8 and 2.7, respectively). HIV-positive adolescents were less likely to use maternal health care services for higher-order pregnancies than for lower-order pregnancies (0.4–0.6). They were, however, more likely to receive prenatal care and PMTCT services when their husband rather than someone else was responsible for the pregnancy (3.7 and 4.9, respectively)