PMID: 11906936Mar 22, 2002Paper

Ultrastructure of the resting ovarian follicle pool in healthy young women

Biology of Reproduction
J P de BruinE R te Velde

Abstract

In humans, follicle quantity and quality decline with age by atresia. In the present study we aimed to describe the quality of the follicle pool through an ultrastructural investigation of resting follicles in young healthy women. From ovarian biopsies of 7 women aged 25-32 yr, 182 small follicles were morphometrically assessed for various signs of atresia. Morphometric variables were analyzed by principal components analysis (PCA) to demonstrate correlations between variables and to construct an objective follicle score. One third of small follicles consisted of primordial follicles. Nucleus:cell ratios remained constant for oocytes and granulosa cells from primordial to primary follicles, suggesting that follicles up to primary stages belong to the resting pool. The distribution of follicle quality scores as derived from PCA showed that most follicles were of good quality and with little signs of atresia. Atresia in resting follicles appears to be a necrotic process, starting in the ooplasma. Early atresia was characterized by increasing numbers of multivesicular bodies and lipid droplets, dilation of smooth endoplasmic reticulum and Golgi, and irregular mitochondria with changed matrix density. In progressive atresia mitocho...Continue Reading

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Citations

Dec 24, 2005·Apoptosis : an International Journal on Programmed Cell Death·R OrtizG H Vázquez-Nin
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