Nearly 1 billion adults — about 12 percent of the world’s population — suffer from obstructive sleep apnea (OSA). Among them, 425 million aged 30 to 69 have moderate to severe OSA. The sleep disorder is more common in men (up to 33 percent are affected) than in women (up to 19...

Estrogen is a sex hormone produced by males and females. Females, however, have more of it than males do.¹ In females, its main job is to control sexual development and the menstrual cycle In males, it plays a part in reproduction.² Moreover, both genders need the hormone for the following...