6 weeks after the date for the expected terminator date either the family are visiting the Neonatal section or the project manager/project nurse visiting the family in order to a status of breastfeeding, vacuum measurement and the infant's growth. In addition the family is contact by telephone the week in which the infant's postnatal age is 6 months. Here is recorded breastfeeding status, the time of any termination of exclusive breastfeeding and the infant's weight at GP visit 5 month old. The infant's growth is defined by its naked weight, Length and head circumference. Previous studies show a number of factors which affect breastfeeding duration. Features concerning socio-demographic background variables, perinatal and psychosocial conditions will gathered by the project manager or project nurse using a questionnaire in an interview with the family and form data in the analyzes. Participation in the project is safe and not associated with risk or discomfort for either mother or infant.