Naslov
Stereological analysis of alpha and beta zones of syncytiotrophoblast in human term placenta

Autori
Durst-Živković, Bosiljka ; Grbeša, Đurđica

Izvornik
The International journal of developmental biology (0214-6282) 35 (1991), 3; 269-273

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
placenta ; syncytiotrophoblast ; stereology

Sažetak
The investigations were carried out to attempt to define and analyze various quantitative structural parameters of syncytiotrophoblast in human term placenta, especially of its functionally active parts, that is alpha and beta zones. The results demonstrated the following: The arrangement of alpha and beta zones in the placenta as a whole is even and regionally independent. Beta zones prevail quantitatively. Alpha zones make up only 8% of the total volume, 18% of the total surface and 39% of the thickness of beta zones. Sexual dimorphism is shown by a significantly higher volume density (VVa)(P<0.002), total volume (Va) (P<0.05) and surface density (SVa) (P less than 0.025) of alpha zones in placentas of female newborns. The fetoplacental index is higher in male newborns. During the tenth lunar month the structure of syncytiotrophoblast is changed. Between the 38th and 39th week the volume and surface densities of alpha zones are significantly higher (P<0.01), and in the 40th week the volume density and total volume of beta zones prevail significantly (P<0.01).

Izvorni jezik
Engleski

Znanstvena područja
Temeljne medicinske znanosti

POVEZANOST RADA