The term "postpartum" refers to the period after childbirth. The word "week" means a unit of time, in this case, seven days. Therefore, "week postpartum" specifically describes the first week following childbirth. This is typically when new mothers are discharged from the hospital and begin recovering at home with their babies. It's an important time for monitoring physical recovery, emotional well-being, and establishing breastfeeding or bottle feeding routines.