However, it is a tricky subject to study as with observational data we often can not separate the effects of drug treatment from other risk factors such as maternal illnesses. (sciencemediacentre.org)
Very few maternal illnesses require the mother to stop breastfeeding. (breastfeedingmums.com)
In addition to breastfeeding issues which require education and support, sometimes maternal illness can occur. (lactationlink.com)