Breastfeeding has numerous advantages for infant, mother and society. However, many mothers discontinue breastfeeding due to problems they encounter. This study aimed to identify problems commonly experienced by breastfeeding mothers during the first six months in Kinshasa.

A prospective cohort study was carried out in Kinshasa from October 2012 to July 2013. A total of 422 mother-infant couples were recruited shortly after being discharged from twelve maternity facilities in Kinshasa and followed-up for six months. Interviews were conducted at the mother’s house during the first week after birth, and thereafter at monthly intervals for six months. Data included mother’s sociodemographic characteristics, the breastfeeding problems she experienced and information on child’s feeding. Incidences of breastfeeding problems encountered during different periods were calculated as well as their confidence intervals.

Cracked or sore nipples, insufficient production of milk and breast engorgement were the most commonly experienced problems by lactating mothers. The problems occurred mainly during the first week (17.1%; CI_95% 13.7–21.1) and the rest of the first month (16.2%; CI_95% 12.8–20.3).

The first month after birth presents the most risk for the occurrence of breastfeeding problems. Mothers should be supported as soon as possible after delivery, to improve their breastfeeding performance and to be informed on how to maintain breast milk supply.