Dr Hernandez is an associate professor of lactational biology in the department of animal and dairy sciences at the University of Wisconsin-Madison.  We discuss the role of serotonin during pregnancy and lactation, how bone health is impacted by lactation, and how there may be cause for concern around the use of SSRIs during pregnancy and lactation when it comes to the health of both mother and baby.  We also touch on how her work relates to the health of production dairy cows, and we talk about what she has learned about breastfeeding in humans and what insight and advice she can offer to mothers who are or plan to breastfeed.