Variations in relative abundance of different cell organelles of steroidogenic cells from seven categories of goat corpus luteum viz. small (1-5 days), medium (6-10 days), large (11-15 days), regressing (16-21 days), previous cycle, penultimate cycle and pregnancy (<30 days), have been analysed. In granulosa luteal cells, smooth endoplasmic reticulum variations were not prominent. Rough endopla...

Bovine corpus luteum tissue was sliced and incubated with beta-[15,15'-(3)H]carotene. The conversion of radioactive beta-carotene into radioactive retinal was substantiated utilizing column chromatography, thin-layer chromatography, high-speed liquid chromatography, and a derivative formation. Lowering of the incubation temperature to 20 degrees C or boiling the tissue eliminated the conversion...

objective: sera from 186 sheep (93 rams and 93ewes) from tabriz, north-west of iran were evaluated for antibodies to toxoplasma gondii using a commercial elisa kit. methods: the animals were divided into two age groups (< 2 years, and > 2 years). results: antibodies to t. gondii were found in 13 of 186 sheep (6.98%). infection rate in ewes was higher than rams but this difference was not signif...

the present study was designed to investigate the impact of exogenous administration of gnrh (receptal vet®, intervet pharmaceuticals ltd., india) on serum progesterone profile and conception rates during mid luteal phase of estrous cycle in buffaloes. estrus was induced using cyclix 2 ml. i/m. (intervet india pvt. ltd., india) and animals were bred naturally during observed estrus. the buffalo...

luteal regressionluteolysisstructural luteolysisfunctional luteolysiscorpus luteum Th corpu luteum is a transient endocrine gland that is specialized for the production of progesterone and that plays a critical role in the establishment and maintenance of pregnancy. The life span of the corpus luteum varies between species and, within a species, can be dramatically altered by events such as mat...

The influence of season on the plasma progesterone concentrations and morphometric values of corpus luteum and ovary was studied through ultrasonography in spring (n=10) and dry hot (n=10) seasons on alternate days during the estrous cycle regardless of estrous phases in Nili-Ravi buffaloes. The mean morphometric values of length and width of ovary and the diameter and area of corpus luteum wer...

Whereas mare corpus luteum does not produce androgens or estrogens in vivo, the incubation of mare corpus luteum microsomes with progesterone and NADPH resulted in 17 alpha-hydroxyprogesterone and estrogen production with a small yield of androstenedione. In the presence of an aromatase inhibitor (4-hydroxyandrostenedione), 17 alpha-hydroxyprogesterone and androstenedione were accumulated. Arom...

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...

OBJECTIVE To determine the best Doppler values for differentiating ectopic pregnancy from a corpus luteum cyst of pregnancy. METHODS This was a prospective study of 80 consecutive patients with the diagnosis of ectopic pregnancy. All ectopic pregnancies were diagnosed on the basis of the presence of an extra-ovarian adnexal mass on sonography and were confirmed surgically. The last menstrual ...