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.
Back pain before menstruation may be part of PMS. To some degree most women will experience back pain on or around the time of the menstrual cycle. This pain can be related to several factors such as stress, pregnancy, miscarriage or even many hormone disorders. However, there are other explanations for back pain that is experienced before a period. Premenstrual syndrome---PMS--- is a set of symptoms that occur before a woman's menstrual cycle begins.