• Women who abuse drugs and alcohol
• Infant with galactosemia
• HIV infection
• Untreated tuberculosis
• Hepatitis C
• Hepatitis B not contraindicated, as long as the baby is vaccinated (at birth, 1 and 6 months of life). Cytomegalovirus is transmitted in breast milk. However, the colonization does not lead to actual disease because of IgG transfer via the placenta during the pregnancy.