Morphology and Morphometric Indices of the Ovary and Uterus in White Laboratory Rats During Postnatal Ontogenesis

Abstract

The study of ovarian and uterine morphology and morphometric parameters during postnatal ontogenesis is essential for understanding reproductive development in mammals. This research investigates the structural and dimensional changes in the ovaries and uterus of white laboratory rats (Rattus norvegicus) from birth to sexual maturity. Histological and morphometric analyses were conducted at key developmental stages (neonatal, prepubertal, pubertal, and adult phases). The results demonstrate progressive growth in ovarian follicle populations, with primordial follicles dominating early stages and Graafian follicles appearing at puberty. Uterine morphometry revealed significant increases in wall thickness, luminal diameter, and glandular development post-puberty. These findings contribute to comparative reproductive biology and provide a foundation for further studies on mammalian reproductive organ development.