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There are multiple size types, designed to fit somewhat different body shapes. Variations include the height of the person's torso (known as back length), whether the bust, waist, and hips are straighter (characteristic of teenagers) or curvier (like many adult women), and whether the bust is higher or lower (characteristic of younger and older women, respectively).
There is no mandatory clothing size or labeling standard in the US, though a series of voluntary standards have been in place since the 1930s. The US government, however, did attempt to establish a system for women's clothing in 1958 when the National Bureau of Standards published Body Measurements for the Sizing of Women's Patterns and Apparel ...
Bra size 70B is suitable for women with underbust girth 68–72 cm and bust girth from 82–84 cm to 86–88 cm. Example 2 A woman with an underbust girth of 89 cm and a bust girth of 108 cm has cup size 19 cm (= 108 cm – 89 cm) or "D". Her underbust girth rounded to the nearest multiple of 5 cm is 90 cm.
One-third of women will experience abnormal uterine bleeding in their life. Normal menstrual cycle has a frequency of 24 to 38 days, lasts 7 to 9 days, so bleeding that lasts longer could be considered abnormal. Very heavy bleeding (for example, needing to use 1 or more tampons or sanitary pads every hour) is another symptom. [19]
Brassière band size is measured below the breasts, not at the bust. A woman with measurements of 36A–27–38 will have a different presentation than a woman with measurements of 34C–27–38. These women have ribcage circumferences differing by 2 inches, but when breast tissue is included the measurements are the same at 38 inches.
A normal menstrual cycle is 21–35 days in duration, with bleeding lasting an average of 5 days and total blood flow between 25 and 80 mL. Heavy menstrual bleeding is defined as total menstrual flow >80ml per cycle, soaking a pad/tampon at least every 2 hours, changing a pad/tampon in the middle of the night, or bleeding lasting for >7 days.
Risk factors for primary dysmenorrhea include: early age at menarche, long or heavy menstrual periods, smoking, and a family history of dysmenorrhea. [12] Dysmenorrhea is a highly polygenic and heritable condition. [23] There is strong evidence of familial predisposition and genetic factors increasing susceptibility to dysmenorrhea.
Of women with heavy menstrual bleeding, up to 20% will have a bleeding disorder. [24] Heavy menstrual bleeding since menarche is a common symptom for women with bleeding disorders, and in retrospective studies, bleeding disorders have been found in up to 62% of adolescents with heavy menstrual bleeding. [25]