Pelvis justo major
"Pelvis justo major" (also called "Giant Pelvis") is a rare condition of the adult female
pelviswhere the pelvis is 1.5 or more times larger than an average pelvis in every direction and is at least 42 cm (16.5 inches) biiliac width. Even though this condition is classified as a congenital abnormality, it is not a medical disease or abnormality of the pelvis (as the pelvis is a true gynecoid shape, only larger).
Women with this condition frequently, at the time of delivery, have a precipitous birth. There is virtually no resistance of the huge pelvic opening to the size of a newborn so only the soft parts resist the birth. With a huge "Justo Major Pelvis", there is no pelvic bone "molding" of the fetal head. With the average pelvic size (2/3 or less "Justo Major" size) the usual pelvic molding process slows the birth, resulting in a slow and gradual stretching of the
vaginal opening for primiparous women. When a huge "Justo Major Pelvis" allows such an extremely rapid vaginal birth, there can be tears of the perinealsoft tissues. At the time of delivery the strong uterine contractions and maternal bearing down almost instantly overwhelm the integrity of a tightened and previously unstretched vaginal orifice. This is often the case if such women have not previously practiced vaginal stretching to the degree that allows such an instant birthing, especially so for a primiparous woman. This "instant delivery" problem causes many OBGYN doctors to stress the importance of women with a huge pelvis practicing pre-delivery vaginal stretching to avoid perineal injury.
Such a large size for the female pelvis is present in less that one in a thousand adult women. When women reach their maximum pelvis size, often by 21 years of age, if they have a huge pelvis the resulting big hips will not go away -- no matter how much they diet, as bone will not shrink. It is not unusual for such women, whose pear shape is due to a huge pelvis, to give up watching calories for smaller hips... leading to
obesity. However, such pear shaped obese women do not necessarily have a huge pelvis and a measurement scan or anthropometryby calipers is required to diagnose the "Justo Major" condition. The incidence of "Justo Major" Pelvis is not found to be a strictly standard deviation type variation as it follows a tail skewed deviation to the right. Incidence varies with geographic regions of the world (e.g. Polandhas a high incidence). "Justo Major Pelvis" is classified as congenital and thought to be partially inherited, especially from the maternal side.
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Look at other dictionaries:
pelvis justo major — a pelvis that is unusually large, with all its dimensions equally increased … Medical dictionary
justo major — See pelvis j.. * * * jus·to ma·jor jəs tō mā jər adj of pelvic dimensions greater than normal * * * jus·to ma·jor (jusґto maґjər) see pelvis justo major … Medical dictionary
justo major — Término arcaico para algo atípicamente grande, como la pelvis ósea de una mujer. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 … Diccionario médico
Pelvis — The lower part of the abdomen located between the hip bones. Organs in the female pelvis include the uterus, vagina, ovaries, fallopian tubes, bladder, and rectum. * * * 1. [NA] The massive cup shaped ring of bone, with its ligaments, at the… … Medical dictionary
giant pelvis — p. justo major … Medical dictionary
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