RESUMEN
Perinatal mental health research typically focuses on the birthing parent's experiences and their influence on birth/child outcomes, while not considering non-birthing parents in similar depth. Non-birthing parents are also at increased risk for mental illness during the perinatal period, and non-birthing parents' health and involvement affect the health of birthing people, fetuses, and newborns, necessitating greater understanding of non-birthing parents' contributions to family functioning. This review examines perinatal mental health disorders in non-birthing parents, their relationship quality with the birthing parent, and how the non-birthing parent's mental health and involvement affects the health outcomes of the birthing parent and the child. Recommendations are provided for healthcare professionals who work with perinatal patients and their families to engage non-birthing parents, learn about non-birthing parent health, and facilitate connections to care. By doing so, professionals working with perinatal patients can optimize health outcomes for their patients and the family as a whole.