Histological changes within ovarian cortex, oviductal and uterine mucosa in case of ovarian cysts presence in sows.

Abstract

Abstract:The aim of study was histological evaluation of oviduct and uterus mucosa in case of cystical ovarian degeneration in sows. Materials for evaluations were received after slaughtering of 294 sows at age of 2-5 years. Sows were eliminated breeding and culled due to reproduction disorders: anoestrus after weaning of piglets, return of estrus, small litters and due to age, number of birth, bad condition after lactation. 20 sows (6.8%) had cysts on ovaries. Histological investigations were conducted on reproductive organs of sows with ovarian cysts. Sows were divided onto two groups: 1. with polycystic ovaries (12 sows), 2. with simple cyst (8 sows) occured unilaterally (3 sows) or bilaterally (5 sows). In our studies we noted different kids of ovarian cysts and structural changes in ovarian cortex like decreasing numbers of ovarian folliculi of all generations, increasing of follicular atresia. We compared the state of oviduct and uterus mucosa in case of polycystic ovaries with the histological changes in these tissues when single cysts were present on the ovaries. The single follicular cysts aren't accompanied with important changes in reproductive system. In case of polycystic ovaries the presence of cyst is connected with occurrence of morphological changes in endothelium of oviduct and uterus which would have been a reason of persistent infertility of pigs.

Histomorphology of the porcine oviduct

“…Researchers (11,21,23,24) determined that, spermatozoa located in the uterotubal junction and isthmus in cows, are located in the deeply situated narrow oviduct crypts in sows.…”

Integrated transcriptomic and metabolomic investigation of the genes and metabolites involved in swine follicular cyst formation

“…The comprehensive analysis of differential metabolite pathways included enrichment analysis and topological analysis. The National Institute of Standards and Technology, 3 Chemical Entities of Interest, 4 and KEGG 5 online databases were used to identify metabolites, investigate biological functions and build pathways. Metabo Analyst 5.0 software 6 was used to analyze different metabolites identified by KEGG pathway analysis.…”

“…Ovarian cysts are a common reproductive disorder that significantly affect the reproductive performance of sows ( 1 ), with an incidence of 2.4–40% ( 2 , 3 ). Ovarian cysts can be divided into follicular cysts and luteal cysts and can be unilateral or bilateral ( 4 ). During the normal estrus cycle, follicle-stimulating hormone stimulates follicle growth and development, and surges of luteinizing hormone trigger the release of ova from mature follicles.…”