Abstract Background Reproductive, maternal, newborn and child health are negatively impacted in conflict-affected settings, and may be acutely affected in frozen conflicts due to fragile health systems and uncertain geopolitical contexts. To better understand maternal health in a frozen conflict zone, we examined maternal health outcomes in Nagorno-Karabakh during a ceasefire period prior to the forced displacement of the entire population. Methods Multistage cluster sampling was used to sample 1023 households in Nagorno-Karabakh during the summer of 2022. From each household, one woman, age 18 to 49, participated in an interviewer-administered survey. Maternal health outcomes were assessed among all married women who had ever given birth. Women with at least one child under 5 years were also asked about their most recent pregnancy. Results Among all married women, 85.5% had ever given birth, 19.0% ever had a miscarriage, and 2.8% ever had a stillbirth. Of the 299 women with at least one child under 5, 97.7% received antenatal care, of which 90.4% had at least 4 visits. Over half experienced toxicosis (51.8%), 16.4% high blood pressure, 13.0% anemia, and 6.4% hemorrhage during their most recent pregnancy. The most common delivery complications were uterine scarring (19.7%), breached birth (7.0%), prolonged labor (6.4%) and hemorrhage (5.7%). Age was found to be a significant factor, with the odds of toxicosis (p = 0.039) and breached birth (p = 0.009) decreasing, yet the odds of miscarriage (p = 0.001) and hypertension (p = 0.007) increasing with age. Conclusions Almost all women reported adequate antenatal care with birth outcomes comparable to global statistics, demonstrating the ability of Nagorno-Karabakh to provide sufficient maternal healthcare while in a frozen conflict. Fortifying and ensuring access to maternal and reproductive healthcare, particularly antenatal care, is vital for ensuring the health and wellbeing of women and children in conflict-affected settings. Key messages • Women in Nagorno-Karabakh received antenatal care and experienced birth outcomes similar to global rates, demonstrating the value of access to reproductive healthcare in conflict-affected settings. • Future studies should examine the impact of forced displacement on the women of Nagorno-Karabakh to better understand the effect of conflict on reproductive and maternal health.