The postpartum period is a critical time marked by significant physiological and psychosocial changes that can affect sleep, emotional well-being, and breastfeeding behaviors. Previous studies indicate that mode of delivery and sleep quality are closely associated with breastfeeding outcomes, with cesarean birth often linked to poorer sleep and lower breastfeeding success. Evidence also suggests that postpartum sleep disturbances are related to reduced breastfeeding self-efficacy, lower motivation, fatigue, depressive symptoms, and shorter breastfeeding duration.

However, the literature lacks studies that evaluate insomnia severity, breastfeeding motivation, and breastfeeding success simultaneously-particularly during the first 48 hours after birth. This analytical study aims to assess insomnia severity, breastfeeding motivation, and breastfeeding success (LATCH) within the first 48 postpartum hours and to examine the relationships among these variables. Findings are expected to support early postpartum clinical interventions to improve maternal and infant health outcomes.

Inclusion Criteria:

• Primiparous or multiparous women aged 18 years and older
• Having a healthy term delivery
• Infant not admitted to the neonatal intensive care unit (NICU)
• Initiated breastfeeding within the first 48 hours postpartum

Exclusion Criteria:

• Complications requiring sedation
• Severe postpartum hemorrhage
• Severe postoperative pain or need for narcotic analgesics

The study population will consist of primiparous and multiparous women aged ≥18 years who have delivered a healthy term infant, whose newborn is not admitted to the NICU, and who initiated breastfeeding within the first 48 hours postpartum.

Individual participant data (IPD) will not be publicly shared due to privacy concerns and the sensitive nature of maternal and infant health information. However, anonymized data may be made available upon reasonable request to the corresponding author after publication of the study results.