Reproduction, fertility, and development · 2025
Prenatal development of the intramural vascular system of the uterine tube in the European shorthair cat.
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Prozorowska-Basińska Ewelina, Jackowiak Hanna
Аннотация
CONTEXT: Early vascular development during the prenatal period is essential for the proper formation of all organs, including the reproductive system.
AIMS: This study aimed to characterize the development of the intramural vascular system in the domestic cat's uterine tube, with emphasis on changes associated with wall layer formation.
METHODS: Uterine tubes from 38 domestic cat fetuses (36-63 days post-conception) were examined using light microscopy, vascular corrosion casts, and scanning electron microscopy.
KEY RESULTS: In early stages, the vascular system of the rudimentary paramesonephric duct (uPD) is simple, comprising longitudinal vessels and a superficial vascular network. Initially, all vessels resemble capillaries. By Days 42-43 post-conception, vascular differentiation into arterioles and venules becomes evident, progressing to arteries and veins with distinct surface relief visible on corrosion casts by late gestation. Approximately by Day 50 post-conception, as the layers develop in the uterine tube wall, a subepithelial capillary network emerges, connecting with the superficial vascular system. At term, the uterine artery becomes tortuous and branches above the isthmus; veins accompany the arteries. The mature intramural vascular system includes circumferential arteries and veins, as well as subepithelial and subserosal capillary networks.
CONCLUSIONS: A basic vascular architecture supporting tissue growth develops prenatally, laying the foundation for postnatal expansion linked to mucosal and muscular layer maturation.
IMPLICATIONS: This first-time analysis of feline uterine tube prenatal angioarchitecture provides novel insights into reproductive system histogenesis in a species both common in human environments and important in veterinary science.
AIMS: This study aimed to characterize the development of the intramural vascular system in the domestic cat's uterine tube, with emphasis on changes associated with wall layer formation.
METHODS: Uterine tubes from 38 domestic cat fetuses (36-63 days post-conception) were examined using light microscopy, vascular corrosion casts, and scanning electron microscopy.
KEY RESULTS: In early stages, the vascular system of the rudimentary paramesonephric duct (uPD) is simple, comprising longitudinal vessels and a superficial vascular network. Initially, all vessels resemble capillaries. By Days 42-43 post-conception, vascular differentiation into arterioles and venules becomes evident, progressing to arteries and veins with distinct surface relief visible on corrosion casts by late gestation. Approximately by Day 50 post-conception, as the layers develop in the uterine tube wall, a subepithelial capillary network emerges, connecting with the superficial vascular system. At term, the uterine artery becomes tortuous and branches above the isthmus; veins accompany the arteries. The mature intramural vascular system includes circumferential arteries and veins, as well as subepithelial and subserosal capillary networks.
CONCLUSIONS: A basic vascular architecture supporting tissue growth develops prenatally, laying the foundation for postnatal expansion linked to mucosal and muscular layer maturation.
IMPLICATIONS: This first-time analysis of feline uterine tube prenatal angioarchitecture provides novel insights into reproductive system histogenesis in a species both common in human environments and important in veterinary science.