AIM: This study examined the effects of a prenatal group education program in Tanzania which was focused on preeclampsia/eclampsia according to knowledge, behavioral intention, Pregnancy-Related Empowerment Scale, satisfaction, and the incidence of preeclampsia. METHODS: The study was conducted in two district hospitals in Tanzania and used a facility-based pre-post quasi-experimental design with concurrent control. The prenatal group education program was developed to focus on preeclampsia/eclampsia and consisted of lectures, discussions, and review sessions directed at participatory group education. The intervention group participated in a midwife-facilitated prenatal group education program, whereas the control group received routine care. Data were collected through questionnaires before the intervention and 1 month later. A descriptive analysis of the data was performed. RESULTS: The study analyzed 95 pregnant women within an intervention group (n = 48) and control group (n = 47). At the 1-month post-test, statistically significant differences were observed between the intervention and control groups in the knowledge score (mean = 3.8, SD = 3.6 vs. mean = -0.8, SD = 3.1, p <
.001) and satisfaction score (mean = 4.9 vs. mean = 4.6, p = .032). Between the two groups, there were no significant differences in the scores of behavioral intention, Pregnancy-Related Empowerment Scale, and the incidence of preeclampsia. CONCLUSION: The prenatal group education program increased the knowledge level regarding preeclampsia and gave higher satisfaction among pregnant women. Knowledge was retained for at least 1 month. Continuity in implementation of this program is recommended.