This leaves breast-feeding problems either to the rare family physicians, or more commonly to lactation consultants who can assist with technical issues -- improving the baby's latch and such -- but can't write prescriptions, check hormone levels or offer a diagnosis.

CNN: Is the medical community failing breast-feeding moms?

The moms who watched (and, sometimes, cried through) the elevating Oprah clip were more likely to nurse and hug their babies -- suggesting heightened levels of oxytocin, which cues lactation -- than another group who laughed along with a video of Jerry Seinfeld telling jokes.

CNN: What really makes people happy