Sentences with phrase «estrogen during menstruation»

Not exact matches

In a normal menstrual cycle, a balance between the hormones estrogen and progesterone regulates the buildup of the lining of the uterus (endometrium), which is shed during menstruation.

This is thought to occur because estrogen and progesterone levels drop suddenly before and during menstruation, this causes spasms in the blood vessels at the base of the neck and can be responsible for severe headaches.