Because the establishment of pregnancy begins at the uterine horn ipsilateral to the corpus luteum (ipsi-horn) in cattle, levels of progesterone (P4) and receptor expression in the endometrial tissue, which regulate the intrauterine environment for embryo development, may differ between the ipsi-horn and the uterine horn contralateral to corpus luteum (contra-horn). The aim of the present study...

In recent years, certain lipids have been found to have an essential role in the vital economy of living cells. The earlier evidence suggesting this relationship was reviewed in 1930 by Bloor, Okey, and Corner (1). Experimental proof of the phenomenon has been based upon two separate procedures. The first method was originally proposed by Mayer and his coworkers, especially Schaeffer and Terroi...

BACKGROUND The goal of this study was to examine the response of the cyclic corpus luteum of cows to the administration of a prostaglandin F2α analogue (PGF) during the transition of refractoriness to responsiveness by investigating ultrasonographic changes in the corpus luteum and changes in plasma progesterone concentration in cows following the administration of PGF 3 and 5 days after ovulat...

Natural pharmaceutical compounds are relied upon for the treatment of many diseases due to their capacity possess natural ingredients with medicinal properties that can treat side effects resulting from toxicity chemical compounds, such as drugs cancer. We prefer use ginseng, which is well known stubborn infertility cases and hormonal disorders associated menopause, hence importance this study ...

Ovarian pregnancy is a rare form of ectopic pregnancy but it is the most common type of nontubal ectopic pregnancy. Many times it is operated with a misdiagnosis of ruptured tubal ectopic pregnancy or hemorrhagic corpus luteum. The high resolution transvaginal ultrasonography is a valuable tool for diagnosis of ectopic pregnancy but ovarian pregnancy still remains a diagnostic problem and a con...

T HE past decade has witnessed a revival of interest in the mammalian corpus luteum. The availability of new techniques is in part responsible but a more important factor has been the increasing use of cows, sheep, pigs and even women as experimental species. The use of these mammals has uncovered, to a much greater degree than was expected, a diversity in the physiology of the corpus luteum, a...

BACKGROUND To achieve multiple oocytes for in vitro fertilization, ovulation induction is induced by gonadotropins; however, it has several effects on oocytes and embryo quality and endometrium receptivity. The aim of this study was to assess ultrastructural changes of corpus luteum after ovarian induction using human menopausal gonadotropin (HMG) and human chorionic gonadotropin (HCG) during l...

In this study, we performed immunohistochemistry of cholesterol side-chain cleavage cytochrome P450 (P450scc), 3beta-hydroxysteroid dehydrogenase (3betaHSD), cytochrome 17alpha-hydroxylase P450 (P450c17), and cytochrome P450 aromatase (P450arom) in the corpus luteum and placenta of Shiba goats. The aim was to clarify the steroidogenic capability of the corpus luteum and placenta of Shiba goats....

The structural changes in the uterine mucosa associated with the phenomena of estrus, menstruation, implantation of the embryo, pregnancy, and the puerperium have, for a long time, been of marked interest to the histologist. The staining reactions of the endometrium with Nile blue, Sudan III, Scharlach R, and osmic acid have indicated the possibility of a connection between the lipid content an...

was explored during various stages of pseudopregnancy, including natural and induced luteal regression. Induced luteolysis was achieved during mid-pseudopregnancy by removal of an oestradiol capsule placed at the onset of pseudopregnancy, which suppressed ovarian oestradiol production. Activity of manganese superoxide dismutase (Mn SOD) was significantly and positively correlated with ovarian p...