shoulder joint, the ball and socket articulation of the humerus with the scapula. The joint includes eight bursae and five ligaments, including the glenoidal labrum that deepens the articular cavity and protects the edges of articulating bones. It is the most mobile joint in the body. Also called humeral articulation.
It is common for young women to have irregular periods when they first begin to menstruate. This means that ovulation (when a womanâs body makes eggs) may not happen for a few months or even for a few years. So you may not have menstrual cramps when you first begin your period. After one, two, or three years, when your hormonal system is more mature, you might have more severe menstrual cramps.
These uterine contractions cause most of the pain felt during menstrual cramps because the contractions inhibit blood flow to the lining of the uterus (the endometrium). In addition, substances known as leukotrienes are also elevated during menstruation, and they may be the cause of menstrual cramps.nowledge center. Menstrual cramps, also known as dysmenorrhea or period pains, are painful sensations felt in the lower abdomen that can occur both before and during a woman's menstrual period. The pain ranges from dull and annoying to severe and extreme.