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Am J Obstet Gynecol. 1967 Oct 15;99(4):466-9.

Histologic and chemical studies of the smooth muscle in the human cervix and uterus.



This study compared chemical and histological measurements of the amount of smooth muscle in the human cervix to determine the extent of correlation of the 2 types of quantifications. Macroscopically normal uteri and cervical specimens from 31 nonpregnant women, aged 21-55 years, were studied. Histological estimates were made of muscle amount, and chemical measurements of actomyosin were made. It was seen that the mean muscle content of the cervix increased from the lower to the upward part. The smallest amount (6.4%) was in the lower cervix; midcervix muscle content increased to 18%; and upper was 28.8%. Chemically, the mean actomyosin content of the uterus was significantly greater than that of the cervix (7.54 vs. 3.72 mg/gm) (P=.01). The 2 types of measurements were correlated in their ability to quantitate muscle mass and amount in the human cervix.

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