The ideal duration for a grandmother's stay after a baby is born typically ranges from one to two weeks, but the "perfect" length depends entirely on the family's specific needs and relationships. Many new parents find that the first week is vital for recovery and navigating the initial sleep deprivation, while the second week allows for "mentoring" in basic baby care and household management. According to common advice on platforms like Reddit, the stay is most successful when the grandmother focuses on "supporting the parents" (cooking, laundry, and cleaning) rather than just "holding the baby." If the relationship is high-stress, a shorter visit of 3 to 4 days might be better to prevent burnout. Conversely, if the partner is returning to work quickly, a stay of 3 to 4 weeks might be necessary. The key is to establish clear boundaries and an "exit strategy" before the visit begins to ensure the new family has enough space to bond and find their own rhythm.