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Results 51 - 100 of 940
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Nizar Khatib - - 2009
PURPOSE: To evaluate the role of ovarian Doppler studies in diagnosing adnexal torsion. METHODS: We included in that study all patients who had an adnexal mass with clinical symptoms of intermittent lower abdominal pain and were hospitalized for at least 48 hours of observation. Our protocol included: measurements of the ...
Tahara Mie - - 2009
To clarify the effects on uterine arterial flow velocity waveforms of uterine contractions following oxytocin infusion and during spontaneous labor. Uterine arterial flow velocity waveforms were obtained by pulsed Doppler methods from 22 women during an oxytocin challenge test (OCT), 26 women during oxytocin-induced labor, and 40 women during spontaneous ...
Keator C S - - 2010
Neuropeptide Y (NPY) is a neurohormone that is typically associated with food intake, but it has also been reported to affect the production of progesterone from luteal tissue in vitro. However, NPY has not been previously immunolocalized in the ovine ovary or in the corpus luteum (CL) of any species, ...
Lam P - - 2009
OBJECTIVES: To quantify endometrial and subendometrial blood flow in Caucasian women with polycystic ovarian syndrome (PCOS) and to determine whether these values differ according to the phenotypic expression of PCOS. METHODS: Transvaginal pelvic ultrasound was performed on the 3(rd)-5(th) day of the menstrual cycle in 36 women with PCOS and ...
Liechty Kenneth W - - 2010
The ex-utero intrapartum therapy (EXIT) procedure was designed to secure the airway at delivery in fetuses who had undergone tracheal occlusion for severe congenital diaphragmatic hernia. The EXIT was then adapted for deliveries where the airway may be difficult to secure, such as large neck masses or congenital high airway ...
Battaglia Cesare - - 2009
INTRODUCTION: Clitoral functional modifications occur during the menstrual cycle. AIM: To prospectively evaluate, by the three-dimensional (3-D) Doppler flow analysis, the hemodynamic clitoral blood flow variations during the menstrual cycle. METHODS. Fourteen young (18-35 years), eumenorrheic (menstrual cycle of >25 and <35 days) women in a stable heterosexual relationship (>1 ...
Hope Joanie Mayer - - 2009
OBJECTIVE: The purpose of this study was to assess the vascular indices generated by 3-dimensional (3D) power Doppler angiography by evaluating the cyclic changes in the vascularity of normal ovaries, including those that were ovulating, nonovulating, and hormonally suppressed. METHODS: In this prospective longitudinal observational study, a cohort of premenopausal ...
Beindorff N - - 2009
To check human chorionic gonadotropin (hCG) effects on luteal blood flow (LBF) and progesterone (P(4)) synthesis, six cows received either 3000 IU hCG or saline (NaCl) on Day 7 (Day 1=ovulation) during two estrous cycles. Plasma P(4) and LBF were measured before (0h) and up to 48h after treatment. Luteal ...
Dane Banu - - 2009
OBJECTIVE: To compare the effects of the levonorgestrel-intrauterine system (LNG-IUS) and depot-medroxyprogesterone acetate (DMPA) on subendometrial vascularisation and uterine artery blood flow. STUDY DESIGN: The trial compared 25 patients wearing a LNG-IUS and 25 patients receiving DMPA. The subendometrial blood flow was evaluated using power Doppler analysis; the pulsatility index ...
Kim Ari - - 2010
OBJECTIVE: To evaluate whether endometrial and subendometrial blood flow parameters measured using three-dimensional power Doppler ultrasound (3D PD-US) can predict pregnancy after IUI. DESIGN: Prospective clinical study. SETTING: Infertility center in a referral hospital. PATIENT(S): One hundred six women who underwent ovulation induction and IUI. INTERVENTION(S): A color Doppler ultrasound ...
Jayaprakasan K - - 2009
OBJECTIVE: To test the hypothesis that ovarian vascularity is increased in women developing ovarian hyperstimulation syndrome (OHSS) and to assess its value as a predictor of OHSS during in-vitro fertilization (IVF). METHODS: 118 subjects undergoing their first cycle of IVF had a three-dimensional (3D) transvaginal ultrasound scan in the early ...
Jordan Anne - - 2009
The aim of this study was to examine the hypothesis that follicular and uterine perfusion as well as endometrial gene expression during the ovulatory period differs after induction of luteolysis during the 1(st) follicular wave compared with the 2(nd) wave or in intact cycle. Nine healthy non-lactating Holstein-Friesian cows were ...
Jones N W - - 2009
OBJECTIVES: Myometrial contractions are one of the most important aspects of effective labor. For cells within the myometrium to work efficiently they need to be well oxygenated and this requires an adequate blood supply. This study used quantitative three-dimensional (3D) power Doppler angiography to calculate the percentage change in myometrial ...
Adali Ertan - - 2009
OBJECTIVE: To investigate blood flow velocity in the ovarian stromal artery and uterine artery in women with polycystic ovary syndrome (PCOS) and to correlate these velocities with clinical and biochemical parameters. METHODS: A prospective study was carried out in 55 patients with PCOS and 42 age-matched women who did not ...
Chang W-C - - 2009
OBJECTIVE: To evaluate differences in uterine perfusion following laparoscopic myomectomy with or without uterine artery ligation (UAL). METHODS: From November 2005 to July 2007, we enrolled prospectively 105 women with symptomatic myomas who were scheduled to undergo laparoscopic myomectomy (57 with UAL (study group) and 48 without (control group)). Power ...
Ng Ernest Hung Yu - - 2009
Endometrial development is largely dependent on a good blood supply to the basal endometrium. This study evaluated the endometrial and subendometrial vascularity in patients with thin (<or=8 mm) endometrium and in those with low volume (<or=2.5 ml) endometrium. Patients undergoing their first IVF cycle were recruited and all followed a ...
Ng Ernest Hung Yu - - 2009
A good blood supply to the endometrium is usually considered as an essential requirement for implantation. Endometrial and subendometrial blood flow was evaluated on the days of human chorionic gonadotrophin (HCG) administration and embryo transfer and the percentage change in endometrial and subendometrial blood flow between these 2 days was ...
Hanstedt A - - 2009
On average, only 20% of the cumulus-oocyte complexes (COC) develop to the blastocyst stage (Merton et al. 2003 Theriogenology 59, 651-674). An increase in the blood supply to individual follicles appears to be associated with follicular growth rates, whereas a reduction seems to be closely related to follicular atresia (Acosta ...
Acosta Tomas Javier - - 2009
To examine whether oxygen (O(2)) and nitric oxide (NO) are temporally associated with the acute changes in luteal function during luteolysis, we determined the real-time changes in the circulating concentrations of progesterone (P4) and nitrite/nitrate (the stable metabolites of NO) and the partial pressure of oxygen (pO(2)) during prostaglandin F(2alpha) ...
Pennati Giancarlo - - 2008
Information on uterine blood flow rate during pregnancy would widely improve our knowledge on feto-placental patho-physiology. Ultrasonographic flow rate evaluation requires the knowledge of the spatial velocity profiles throughout the investigated vessel; these data may be obtained from hemodynamic simulations with accurate computational models. Recently, computational models of superficial vessels ...
Chang Wen-Chun - - 2009
OBJECTIVE: To evaluate vascular perfusion and uterine healing after laparoscopic myomectomy using three-dimensional power Doppler ultrasound (3D-PDU). DESIGN: Prospective study. SETTING: University-affiliated hospital. PATIENT(S): Ninety-seven women with symptomatic myomas warranting laparoscopic myomectomy. INTERVENTION(S): Three-dimensional PDU obtained preoperatively and 1 week and 3 months postoperatively. MAIN OUTCOME MEASURE(S): Resistance index, pulsatility ...
Adaikan P Ganesan - - 2009
OBJECTIVE: To evaluate the effectiveness of phytoestrogens as alternatives for selective dysfunctional changes in the menopausal rabbit model. DESIGN: Prospective, vehicle-controlled experimental study. SETTING: Reproductive pharmacology laboratory in a university department. ANIMAL(S): Twenty-four rabbits with experimentally induced menopause and six intact controls. INTERVENTION(S): Surgical menopause was induced in 24 rabbits ...
Majoor, Jan-Willem
The effects of hCG administration on size and blood flow of the corpus luteum were studied in 10 mares. The size and blood flow of the corpus luteum were analysed with pictures gained by ultrasound. Three out of four mares in the group of 21 days pregnant lost their pregnancy ...
Kavasmaa T - - 2008
BACKGROUND: We studied the interactions between uterine and placental hemodynamics during maternal hypotension in chronically instrumented fetal sheep. In addition, we investigated maternal hemodynamic characteristics, fetoplacental hemodynamics and fetal acid-base status when a retrograde diastolic uterine artery blood flow pattern is present during maternal hypotension. METHODS: Invasive maternal and fetal ...
Dahm-Kähler Pernilla - - 2008
AIM: Uterine transplantation is developing into a clinical treatment for uterine factor infertility. An animal model with a similar uterus size and vessels to humans and with pregnancy extending over several months would be beneficial for research on uterine transplantation. The aim of this study was to develop and evaluate ...
Krueger Lars - - 2009
The aim of this study was to determine if transrectal colour Doppler sonography of uterine arteries is a useful method to quantify uterine changes during the first 12 weeks after parturition in cows. Examinations were carried out on days 1, 7, 14, 28, 56 and 86 after parturition (day 0) ...
Rauch Alexandra - - 2008
The goals of the present study were to investigate whether colour Doppler sonography can be used to differentiate temporary from persistent ovarian follicles and follicles with luteal tissue from follicles without luteal tissue and to assess the response of follicular cysts to administration of a gonadotropin releasing hormone (GnRH) analogue. ...
Wilkens Julia - - 2008
INTRODUCTION: Asoprisnil, a novel orally active selective progesterone receptor modulator, is being studied for the management of symptomatic uterine leiomyomata. The exact mechanism of action is not yet discerned. The primary objectives of this double-blind, randomized, placebo-controlled study included evaluation of the effect of asoprisnil on uterine artery blood flow. ...
Ng Ernest Hung Yu - - 2008
PURPOSE: To compare ovarian stromal blood flow indices in the follicular phase and after clomiphene citrate (CC) in infertile women. METHODS: Pulsatility index (PI), resistance index (RI), and peak systolic blood flow velocity (PSV) of ovarian stromal vessels were determined by spectral Doppler analysis in the early follicular phase and ...
Jiménez Mirela F - - 2008
BACKGROUND: A better understanding of the uterine and endometrial vascularization in intrauterine device (IUD)-induced side effects is clearly of paramount importance in terms of both physiological and pathophysiological changes and may permit assessment for future therapeutic treatments. The aim of the study was to quantify the subendometrial microvascularization and uterine ...
Lazzarin Natalia - - 2009
OBJECTIVE: To determine the effect of different therapeutic approaches on uterine artery blood flow in women with recurrent miscarriage (RM) and impaired uterine perfusion. DESIGN: Prospective, randomized study. SETTING: Department of Obstetrics and Gynecology, University of Rome "Tor Vergata," Italy. PATIENT(S): Sixty women with unexplained RM and impaired uterine perfusion. ...
Matsui Motozumi - - 2009
Transrectal real-time ultrasonography (US) has been developed as a research and practical tool in bovine reproduction. Non-invasive US observations have made it possible to provide real-time and serial analyses of ovarian morphological changes and fetal development and have generated new information on reproductive physiology during the bovine oestrous cycle and ...
Siddiqui M A R - - 2009
Color-Doppler ultrasonography was used to compare the vascularity of the preovulatory follicle between heifers that became pregnant compared with nonpregnant. Heifers (n=34) received a luteolytic dose of PGF2alpha when the diameter of the largest follicle of the second follicular wave reached > or =11 mm (actual diameter 11.63+/-0.06 mm). An ...
Wakeman Sarah - - 2009
OBJECTIVE: To compare uterine and ovarian blood flow, measured by Doppler ultrasound, in the follicular phase of the menstrual cycle, in women who conceived to women who did not conceive during that cycle. DESIGN: A prospective study of 192 women looking at markers of ovarian reserve between August 2000 and ...
Boxmeer Jolanda C - - 2008
BACKGROUND: Ovarian stimulation gives rise to supraphysiological estradiol levels, which may affect oocyte quality. This study aims to investigate whether ovarian stimulation deranges the homocysteine pathway thereby affecting the pre-ovulatory follicle. METHODS: Blood samples were collected on cycle day 2 and the day of hCG administration in 181 women undergoing ...
Honnens A - - 2008
Transrectal color Doppler sonography was used to investigate the effects of a gonadotropin treatment to induce superovulation on uterine blood flow and its relationship with steroid hormone levels, ovarian response and embryo yield in dairy cows. The estrous cycle of 42 cows was synchronized by using PGF(2alpha) during diestrus and ...
Crocco Melisa - - 2008
Liolaemus elongatus (Liolaemidae) is a viviparous, mainly lecithotrophic species with placental structures specialized for uptake of oxygen and inorganic nutrient transport. An allantoplacenta and an omphaloplacenta are present during early embryonic stages (25-28) and there is a moderate distension of the uterine wall and major glandular activity in the uterine ...
David A L AL Prenatal Gene Therapy Group, Institute for Women's Health, Royal Free and University College London Medical School, London, UK. - - 2008
Impaired materno-placental perfusion causes two important obstetric complications, fetal growth restriction and preeclampsia. This study investigated whether adenoviral vector-mediated overexpression of vascular endothelial growth factor (VEGF) in the uterine arteries (UtAs) increases uterine artery blood flow (UBF). First-generation adenovirus vectors (5 x 10(11) particles) containing the VEGF gene (Ad.VEGF-A or ...
Honnens A - - 2009
The goal of the present study was to investigate ovarian blood flow and ovarian response in cows undergoing a gonadotropin treatment to induce a superovulatory response, using transrectal colour Doppler sonography. Forty-two cows including 19 cross-bred, 14 German Holstein and 9 German Black Pied cows were examined sonographically before hormonal ...
Jayaprakasan K - - 2008
BACKGROUND: This study evaluated the effect of pituitary desensitization on ovarian volume, antral follicle count (AFC), and ovarian blood flow indices and their value as predictors of ovarian response during assisted reproduction treatment. METHODS: A total of 115 subjects aged <40 years with follicle-stimulating hormone (FSH) levels <12 IU/l underwent ...
Monteleone Patrizia - - 2008
It has become increasingly clear that the follicular microenvironment of the maturing human oocyte is a determining factor for the implantation potential of an embryo deriving from that oocyte. Indeed the quality and maturity of an oocyte are influenced by the level of intrafollicular oxygen content which, in turn, is ...
Zabihi S - - 2008
Maternal diabetes affects the development of the offspring by altering the uterine environment. We aimed to investigate the extent to which the blood flow (measured as Tissue Perfusion Units; TPU) to implantation sites and the expression of developmentally important genes in the offspring are affected by maternal diabetes. We measured ...
Chang Katherine - - 2008
Pregnancy is a physiological state that involves a significant decrease in uterine vascular tone and an increase in uterine blood flow, which is mediated in part by steroid hormones, including estrogen, progesterone, and cortisol. Previous studies have demonstrated the involvement of these hormones in the regulation of uterine artery contractility ...
Miwa Ichiro - - 2009
OBJECTIVE: To characterize pathophysiologic features of a "thin" endometrium. DESIGN: A prospective observational study. SETTING: University Hospital and City General Hospital. PATIENT(S): Patients with normal-thickness endometrium (Normal-Em group: endometrial thickness >or=8 mm; n = 57) and thin endometrium (Thin-Em group: endometrial thickness <8 mm; n = 17). MAIN OUTCOME MEASURE(S): ...
Dechaud Herve - - 2008
In IVF programmes, transvaginal ultrasonography is used as a non-invasive method to evaluate uterine receptivity. The aim of this study was to determine when to perform this investigation in order to optimize prediction of the likelihood of pregnancy. Over 9 months, 124 patients undergoing IVF or intracytoplasmic sperm injection were ...
Golestani Reza - - 2008
OBJECTIVE: Measuring blood flow using a special form of color Doppler ultrasonography can help radiologists to identify the stages of development of organs, such as the uterus and ovary. The aim of this study was to determine the relationship between arterial blood flow to the uterus and ovaries at different ...
Ferreira J C - - 2008
Transrectal color and power Doppler ultrasonography was used to study uterine blood flow and perfusion in mares with and without uterine cysts. Vascular perfusion of the uterus and blood flow velocities, vascular perfusion, diameter, circumference, and area of a cross section of the mesometrial attachment were evaluated. To study the ...
Shirasuna Koumei - - 2008
Prostaglandin F(2)(alpha) (PGF(2)(alpha)) released from the uterus causes alterations in luteal blood flow, reduces progesterone secretion, and induces luteolysis in the bovine corpus luteum (CL). We have recently discovered that luteal blood flow in the periphery of the mature CL acutely increases coincidently with pulsatile increases in a metabolite of ...
Cho SiHyun - - 2008
OBJECTIVE: The aim of this study was to evaluate the long-term clinical effects of a levonorgestrel-releasing intrauterine device (LNG-IUD) on adenomyosis. STUDY DESIGN: A LNG-IUD was inserted into 47 patients who were diagnosed with adenomyosis. Uterine volume, uterine artery blood flow, pictorial blood loss assessment chart (PBAC) scores, and the ...
Krzymowski T - - 2008
A critical analysis of the results of research in the function of the endometrium was carried out and a view point presented. The role of the endometrium in endocrine regulation of the oestrus cycle can be summarized as follows: 1. The transfer of prostaglandin F(2alpha) (PGF(2alpha)) from the uterus to ...
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