Acute antenatal stressful life events (SLEs) during pregnancy are well-established risk factors for adverse birth outcomes. However, little is known about how distinct constellations of antenatal SLEs, shaped by early adversity, material hardship, and intimate partner coercive control, combine to influence perinatal health. Data were drawn from 5,280 participants in the Kansas Pregnancy Risk Assessment Monitoring System. Thirteen antenatal SLEs were analyzed using latent class analysis to identify distinct stress profiles. Five distinct SLE profiles were identified: (1) Family Member Illness and Death (16.3%); (2) Multiple Overlapping Stressors (5.2%); (3) Financial Insecurity (11.2%); (4) Residential Instability and Family Conflict (8.7%); and (5) Low Stress (58.6%). The Multiple Overlapping Stressors class showed the greatest risk of low birth weight, small for gestational age, and preterm birth. Substantial heterogeneity in antenatal SLEs highlight distinct pathways through which early adversity, material hardship, and relational traumas shape perinatal health.