Mothers more sensitive to crying babies thanks to hormone, study says, Science

Oxytocin: All About the Love Hormone - Baby Chick

Yes, having a baby really does alter your brain

Nursing Is Much More Than Milk — Nancy Mohrbacher

What really happens when babies are left to cry it out?

Baby Crying Effect on Mother — Generation Mindful

The Con of Controlled Crying – Pregnancy Birth and Beyond

Women's bodies respond differently to an infant's cry than men's bodies

Neurobiology of culturally common maternal responses to infant cry

How Important Is Physical Contact with Your Infant?

Sleep training, cortisol & stressed out babies? – Little Ones

The New Science of Motherhood, Science

Happy? Sad? Breastfeeding May Affect Babies' Awareness of Social Cues

Maternal Mentality Scientific American