You have yourself. Diary of a Tired Mom. Elena Tiranova

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      Oxytocin is both a hormone that affects various organs (including the breasts and uterus) and a neurotransmitter (a chemical messenger in the brain). It controls key aspects of the reproductive system, including childbirth and lactation, as well as human behavior. There are 4 neurochemicals in the human brain. They give rise to a feeling that we describe as «happiness» (ed.)