title: [Studies on improving the fertility of aged sows. 2. Results of histological studies on the structure of the endometrium in aged sows during estrous cycle].
abstract: Histomorphological and histometric techniques were employed to study cyclic processes in the endometrium. Specimens of uterus were obtained on the 1st, 5th, 8th, 13th, 17th and 21st days of the cycle. The effect of oestrogens, which are produced in large amounts during pro-oestrus, oestrus and to some extent in metoestrus, was reflected in proliferative processes in the epithelium, with increases in the cell population, thickness of the epithelium, and height of the superficial and glandular epithelium. During oestrus the subepithelial layer was broad and was rich in lymphocytes and neutrophile grandulocytes, while the lamina propria showed considerable oedema and hyperaemia. The action of gestagens during dioestrus led to an increase in glandular structures due to the development of more convolutions and a more even distribution of glands throughout the entire propria. There was evidence of active glandular secretion, which during the course of dioestrus resulted in a relatively low and single-layered superficial and glandular epithelium.
mesh_terms: D000818:Animals; D004717:Endometrium / Q000033:anatomy & histology; D004971:Estrus; D005260:Female; D005298:Fertility; D011247:Pregnancy; D013552:Swine / Q000502:physiology*
vernacular_title: Untersuchungen zur Steigerund der Fruchtbarkeitsleistung bei Altsauen 2. Mitt.: Ergebnisse histologischer Untersuchungen über den Aufbau des Endometriums von Altsauen während des Zyklus