Sleep pattern disturbances are a common issue among pregnant women, particularly in the third trimester, characterized by difficulty falling asleep, frequent nighttime awakenings, and reduced sleep quality. This condition can impact the mother's physical and psychological health as well as her comfort during pregnancy. Prenatal yoga is a non-pharmacological intervention that can serve as a supportive approach to help manage sleep pattern disturbances. The aim of this paper is to describe changes in sleep quality in two third-trimester pregnant women following the implementation of prenatal yoga as part of nursing care in Kalirejo Village, Pesawaran Regency. This professional nursing paper employs a case study approach, applying nursing care to two third-trimester pregnant women experiencing sleep pattern disturbances. Data were collected through interviews, observations, physical examinations, and documentation. Sleep quality was evaluated using the Pittsburgh Sleep Quality Index (PSQI) before and after the intervention. The intervention consisted of 45-minute prenatal yoga sessions, conducted alternately in the morning and afternoon over a period of three days. Assessment results indicated that both patients experienced sleep pattern disturbances characterized by difficulty sleeping, frequent nighttime awakenings, and a sense of inadequate rest. Evaluation results showed an improvement in sleep quality scores in both cases. For Mrs. A, the PSQI score decreased from 11 pre-intervention to 5 post-intervention, while for Mrs. S, the score dropped from 12 to 4. In addition to changes in PSQI scores, both patients reported reduced frequency of nighttime awakenings, increased comfort during rest, and sounder sleep. The implementation of prenatal yoga in both cases was associated with improved sleep quality, suggesting it could be considered a supportive non-pharmacological intervention in nursing care for third-trimester pregnant women. As these findings are based on a case study involving two patients and a three-day intervention period, further evaluation with a larger sample size and a longer follow-up period is warranted.