For people who menstruate, your monthly cycle sets the rhythm for so many parts of your life — from sex to digestion to your emotions. So it only makes sense that your period also plays a role in...

Menstrual cramps are uncomfortable but, in general, a harmless side effect of menstruation. Some people suffer from bad stomach and back pain, headaches and diarrhea while others don’t even notice their...

Oxytocin is one of the most important hormones between a mother and her baby. Researchers at Kyoto University and Azabu University in Japan report in a new study that the levels of oxytocin correspond...