The use of ultrasound as a tool in small animal reproduction has expanded from its initial role in the evaluation of pregnancy in the female to its current use in monitoring fetal development, timing gestation and predicting parturition, diagnosis and management of reproductive tract disease and in supplementing breeding soundness examinations. In fact, B-mode ultrasonography has become an indi...

The effect of Cu status, supplementation, and source on pituitary responsiveness to exogenous GnRH was evaluated using nine multiparous, nonpregnant, nonsuckling, ovariectomized Angus cows (7.1 +/- 3.3 yr; 622.9 +/- 49.8 kg; BCS = 6.0 +/- 0.5). Cows were considered Cu-deficient based on liver Cu concentrations (< 30 mg of Cu/kg of DM) after receiving a low-Cu, forage-based diet supplemented (DM...

This study characterized seasonal changes in circulating LH and testosterone and in semen production and quality in the Northern pintail duck. Plasma LH and testosterone were measured in blood samples collected weekly throughout the year from eight males exposed to natural fluctuations in day length and temperature. Semen quality was evaluated weekly in these same males from April-June, the mon...

The concentration of leukaemia inhibitory factor (LIF) was measured in uterine flushings obtained from normal fertile women, from women with unexplained infertility and from women who suffered recurrent miscarriage. In normal fertile women, LIF was not detected in flushings obtained on days luteinizing hormone (LH)+0 to LH+6 of the cycle, but concentrations gradually increased from day LH+7 to ...

The orphan nuclear receptors, steroidogenic factor 1 (SF-1) and DAX-1, are involved in gonadotroph differentiation, and SF-1 has been shown to activate the LH-beta and glycoprotein hormone alpha-subunit (alpha GSU) gene promoters. Pituitary adenomas from 34 patients [13 somatotroph tumors, 4 prolactinomas, and 17 clinically nonfunctioning pituitary adenomas (NFPAs)] were enzymatically dispersed...

Progesterone (P) powerfully inhibits gonadotropin-releasing hormone (GnRH) secretion in ewes, as in other species, but the neural mechanisms underlying this effect remain poorly understood. Using an estrogen (E)-free ovine model, we investigated the immediate GnRH and luteinizing hormone (LH) response to acute manipulations of circulating P concentrations and whether this response was mediated ...

OBJECTIVE To evaluate surgery-related outcomes of laparoscopic (LH) and vaginal hysterectomy (VH) in patients with a history of previous cesarean section (CS). STUDY DESIGN Data on 289 consecutive patients with a history of CS undergoing VH (n = 49, 17%) and LH (n = 219, 76%) were collected. Basic descriptive statistics, univariate and multivariate analyses were performed to evaluate surgery-...

BACKGROUND The number of terminal sialic acid and sulfonated N-acetylgalactosamine (SO(3)-GalNAc) on gonadotrophins in serum varies during the menstrual cycle and changes at menopause, suggesting that gonadal steroids modify their oligosaccharide synthesis. Our objective was to determine the effects of 17beta-oestradiol (E(2)) and a progestogen, norethisterone acetate (NETA), on the sulfonation...

fn(x) _ (nh d ) ' ~= 1 K((x X1)lh) where h = h n is a sequence of positive numbers, and K is an absolutely integrable function with f K(x) dx =1 . Let J, = f l f ,(x) f (x) ( dx. We show that when limnh = 0 and limnnh d = oo, then for every e > 0 there exist constants r, no > 0 such that P(Jn > e) <_ exp(-rn), n ? no. Also, when J, -p 0 in probability as n --p oo and K is a density, then limnh ...

BACKGROUND MicroRNAs have been widely-studied with regard to their aberrant expression and high correlation with tumorigenesis and progression in various solid tumors. With the major goal of assessing gonadotropin (luteinizing hormone, LH) contributions to LH receptor (LHR)-positive ovarian cancer cells, we have conducted a genome-wide transcriptomic analysis on human epithelial ovarian cancer ...