Search Results
Results 401 - 450 of 1267
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Furneaux E C - - 2001
For a majority of women, nausea and vomiting of pregnancy (NVP) is an unpleasant but normal feature of pregnancy. NVP has a largely unknown etiology, but it is widely agreed that physiological, psychological, genetic, and cultural components are contributing factors. The occurrence of NVP may be of benefit in pregnancy, ...
Guvenal T - - 2001
OBJECTIVE: To evaluate and to compare the predictive value of cervicovaginal beta-hCG and prolactin levels in spontaneous preterm delivery. METHODS: The preterm labor group and normal pregnancy group consisted of 17 and 43 patients between 24 and 36 weeks' gestation, respectively. A single cervicovaginal beta-hCG and prolactin measurement were made ...
Yaron Y - - 2001
OBJECTIVES: The purpose of the present study was to evaluate whether a gender-related difference exists in first trimester markers used for Down syndrome screening, namely nuchal translucency (NT), maternal serum pregnancy-associated plasma protein-A (PAPP-A), and free beta-human chorionic gonadotrophin (beta-hCG), and whether this has an influence on screening performance. METHODS: ...
Butler S A - - 2001
BACKGROUND: Home pregnancy testing devices claim >99% diagnostic accuracy for pregnancy and utility on the first day of the missed menses or earlier. We investigated the forms of human chorionic gonadotropin (hCG) in early pregnancy urines, the diagnostic accuracy claim, and the abilities of 15 devices to detect the different ...
Wu M Y - - 2001
PROBLEM: To study the correlation of interleukin (IL)-10, IL-11 leukemia inhibitory factor (LIF), placental growth factor (PIGF), and transforming growth factor (TGF)-beta and outcome of human pregnancy. METHOD OF STUDY: We prospectively measured the serum levels of these cytokines in patients undergoing in vitro fertilization (IVF) programs. A total of ...
Levsky M E - - 2001
Modern urine beta-human chorionic gonadotropin (HCG) assays that use enzyme-linked immunosorbent assay (ELISA) technology are sensitive and specific for diagnosing pregnancy, both intrauterine and ectopic, and have become indispensable to the practice of Emergency Medicine. A urine HCG test is often relied on by the Emergency Physician as a critical ...
Guedes De Pinho P - - 2001
beta-Carotene and six xanthophylls (lutein, neoxanthin, violaxanthin, luteoxanthin, cryptoxanthin, and echinenone) have been identified and semiquantitatively or quantitatively determined in musts and port wines for the first time. An HPLC method was developed and compared with that of one based on thin layer cromatography with scanning densitometry. The most abundant ...
Richard C A - - 2001
OBJECTIVE: To determine the physiological range of hCG in early pregnancy. DESIGN: Retrospective study of patient charts. SETTING: Magee-Women's Hospital IVF clinic, Monroeville, Pennsylvania. PATIENT(S): Sixty patients with successful, singleton birth outcomes. INTERVENTION(S): Serum hCG measurements on days 12-16 post-oocyte retrieval (OR). MAIN OUTCOME MEASURE(S): Lowest values, highest values, mean ...
Birken S - - 2001
Human chorionic gonadotropin, the glycoprotein hormone of pregnancy, is found naturally in blood and urine in a variety of isoforms. These variants are related to both peptide bond cleavages (such as the nicked forms of hCG) and the beta core fragment urinary metabolite, as well as the larger variety of ...
Wilcox A J - - 2001
CONTEXT: Pregnancy test kits routinely recommend testing "as early as the first day of the missed period." However, a pregnancy cannot be detected before the blastocyst implants. Due to natural variability in the timing of ovulation, implantation does not necessarily occur before the expected onset of next menses. OBJECTIVE: To ...
Sieroszewski P - - 2001
OBJECTIVE: Threatened abortion is one of the major problems in Obstetrics and applies to (1/3) of all pregnancies. The aim of this study was to establish normal ranges for Doppler indices of the flow velocity waveforms in uterine arteries (S/D, RI, PI) and ss-hCG serum concentrations in a control group ...
Lazarenko G C - - 2001
Our primary objective was to assess the agreement between urine pregnancy tests done in the emergency department (ED) and those done by the Calgary Laboratory Services (CLS). Our secondary objective was to compare turnaround times for tests done in the ED and those done in the laboratory. This prospective study ...
Weinans M J - - 2001
Maternal serum human thyroid-stimulating hormone (TSH) levels were investigated in chromosomally normal and Down syndrome pregnancies to determine whether TSH can be used as a marker for Down syndrome in the first trimester. Measurements were conducted on stored serum samples collected from 23 Down syndrome pregnancies and 115 unaffected pregnancies ...
Yeo C P - - 2001
OBJECTIVES: The prevalence of gestational transient thyrotoxicosis (GTT) in Europeans evaluated during the 8th to 14th weeks of pregnancy is 2-3%. However, there is evidence that GTT may be more common in some Asian populations. The aims of this study were to evaluate the prevalence of thyroid hormone abnormalities in ...
Senior B W - - 2001
The hormone human chorionic gonadotropin (hCG) serves to maintain the fetus during early pregnancy and regulate the onset of labor in late pregnancy. hCG also prevents Neisseria gonorrhoeae from developing invasive characteristics. Part of the beta subunit of hCG has an amino acid sequence similar to that of the hinge ...
Frishman G N - - 2001
OBJECTIVE: The objective of this study was to investigate the prognostic significance of initially low serum early human chorionic gonadotropin levels in in vitro fertilization pregnancies that progress to an intrauterine gestational sac. STUDY DESIGN: This retrospective cohort study compared 65 in vitro fertilization pregnancies with an initial human chorionic ...
Sills E S - - 2001
OBJECTIVE: To describe serum levels of human chorionic gonadotropin (hCG) as a function of hCG injection method (subcutaneous vs. intramuscular) among infertile women undergoing ovulation induction. DESIGN: Prospective, randomized clinical trial. SETTING: Major urban infertility referral center. PATIENT(S): Women presenting for infertility evaluation and ovulation induction. INTERVENTION(S): Controlled ovarian hyperstimulation ...
Manson J M - - 2001
The objective of this study was to develop and validate algorithms to detect pregnancies from the time of first clinical recognition by using Kaiser Permanente automated databases from Portland, Oregon. In 1993--1994, the authors evaluated these databases retrospectively to identify markers indicative of initial clinical detection of pregnancy and pregnancy ...
Talbot J A - - 2001
OBJECTIVE: We examined the charge heterogeneity and carbohydrate complexity of hCG in healthy pregnant Asian subjects and Asian women with gestational thyrotoxicosis to assess whether particular glycoforms of hCG are associated with the thyrotoxicosis of pregnancy. DESIGN: Blood was taken at 8-16 weeks of gestation from five pregnant Asian women ...
Spencer K - - 2001
In 45 cases of trisomy 18 and 493 control pregnancies at 10-14 weeks of gestation, maternal serum inhibin A, total activin A, free beta-hCG and PAPP-A were measured. In the trisomy 18 pregnancies the median values were 0.74 MoM for inhibin A, 1.23 MoM for activin A, 0.38 MoM for ...
Agudelo B - - 2001
We aimed at establishing the correlation between karyotype of anembryonic and embryonic first trimester pregnancies and serum levels of beta-hCG, 17beta-estradiol and progesterone. Chromosomal analyses were performed on products of conceptions lower than 12 weeks, using standard-banding protocols. Measurements of 17beta-estradiol and progesterone were carried out by immunoenzymatic assays and ...
Liao A W - - 2001
BACKGROUND: The possible effect of assisted reproduction on first-trimester screening for trisomy 21 was examined by fetal nuchal translucency thickness (NT), maternal serum free beta-human chorionic gonadotrophin (HCG) and pregnancy-associated plasma protein-A (PAPP-A). METHODS: Parameters were measured at 11-14 weeks in 411 singleton pregnancies achieved by controlled ovarian stimulation, including ...
Wu K H - - 2001
Synaptic transmission at the vocal synapse, the laryngeal neuromuscular junction, of Xenopus laevis has been shown to be regulated by long-term changes in circulating estrogen. In females, high levels of circulating estrogen also accompany gonadotropin-induced ovulation and oviposition and the switch from sexually unreceptive to receptive states, including changes in ...
Fanchin R - - 2001
High-frequency uterine contractions at the time of non-cavitating embryo transfer influence adversely IVF-embryo transfer outcome. This prompted us to quantify prospectively the possible decline in uterine contraction frequency occurring during later stages of the luteal phase of ovarian stimulation, up to the time of blastocyst transfers, in 43 IVF-embryo transfer ...
- - 2001
In a prospective, comparative, dose-finding study, the minimal effective dose of recombinant human LH (rhLH) required to induce final follicular maturation and early luteinization in patients undergoing in vitro fertilization and embryo transfer was determined. In addition, the efficacy and safety of rhLH were compared with urinary human CG (u-hCG). ...
Arima H - - 2001
We recently reported that of all hydrophilic cyclodextrin (CyD) derivatives examined, 2,6-di-O-methyl-beta-cyclodextrin (DM-beta-CyD) most significantly increased the aqueous solubility and the dissolution rate, resulting in the improvement of oral bioavailability of the immunosuppressive drug tacrolimus in rats. In the present study, we showed that DM-beta-CyD increased the dissolution rate and ...
Schaff E A - - 2001
The study was conducted to determine whether the administration of mifepristone followed by vaginal misoprostol can induce an abortion in early pregnancy when no gestational sac is present on sonogram. This report presents a prospective, pilot study of 30 healthy adult women, pregnant and seeking an abortion, and with no ...
Maymon R - - 2001
The current study compared triple serum screening results and outcomes in 37 oocyte donation (OD) and 46 self oocyte IVF-conceived singletons of similarly aged women (28.8 +/- 4.4 years and 30.7 +/- 4.5 years respectively). Both groups were followed from their embryo transfer and throughout pregnancy. Although the daily pattern ...
Ginsberg J - - 2001
Human chorionic gonadotropin (hCG), which is capable of thyrotropic activity, is believed responsible for the hyperthyroidism of gestational trophoblastic disease and hyperemesis gravidarum. Hyperplacentosis is a condition of heightened trophoblastic activity characterized by increased placental weight and circulating hCG levels higher than those associated with normal pregnancy. We report the ...
Bar-Hava I - - 2001
PURPOSE: To determine whether the results of triple-test analysis differ between spontaneous and IVF pregnancies. METHODS: The study population consisted of 140 women with singleton pregnancies, 70 by IVF, and 70 by spontaneous conception. The groups were matched for maternal age, gestational week, and laboratory batch. The levels of all ...
Berezowski A T - - 2001
A case of prenatal diagnosis of fetal ovarian hyperstimulation in a pregnancy of 35 weeks is reported. Two large cystic septate ovaries with no internal vegetations were observed in the fetal abdomen. The fetus was macrosomic and the remaining morphology was normal. Polyhydramnios and placental thickening were present, with no ...
Popnikolov N - - 2001
The proliferation of normal human breast epithelial cells in women is highest during the first trimester of pregnancy. In an attempt to analyze this hormonal environment in a model system, the effect of host mouse pregnancy and the administration of human chorionic gonadotropin (hCG) were assessed in normal human breast ...
Zayed F - - 2001
OBJECTIVE: This study was designed to evaluate the predictive value of beta-hCG levels in predicting the pregnancy outcome. METHODS: A retrospective analysis was done on 423 pregnant patients following assisted conception (stimulated in vitro fertilization [SIVF] and stimulated intra uterine insemination [SIUI]). These were monitored with plasma beta-hCG on day ...
Merviel P - - 2001
OBJECTIVE: To study the relation between serum human chorionic gonadotrophin (hCG) levels measured at 15-18 weeks and gestational disorders, assess their correlation with the artery uteroplacental Doppler (AUD) at 24 weeks among nulliparas, and assess the predictivity of the hCG/hPL (human placental lactogen) ratio for pre-eclampsia. STUDY DESIGN: Retrospective study ...
Banerjee S - - 2001
OBJECTIVE: To assess prospectively the ability of two multiparameter diagnostic models and their individual components to predict the outcome of early pregnancies which could not be identified on transvaginal ultrasound scan. DESIGN: Prospective observational study. SETTING: Dedicated early pregnancy unit in an inner city teaching hospital. POPULATION: Women with a ...
Magee L A - - 2001
OBJECTIVE: To evaluate the generalizability of randomized controlled trial (RCT) data to obstetric practice, using the example of beta-blocker therapy. STUDY DESIGN: Descriptive comparison of characteristics of participants, interventions, and outcomes assessed between a meta-analysis of trials of beta-blocker therapy in pregnancy, and a prospective cohort of beta-blocker exposed callers ...
Wald N J - - 2001
OBJECTIVE: To investigate whether an appropriate combination of maternal serum inhibin A, free beta-human chorionic gonadotropin (free beta-hCG), unconjugated estriol (uE3), and alpha-fetoprotein (AFP) may be an effective means of screening for pre-eclampsia in the second trimester of pregnancy. SETTING: Women who attended an antenatal clinic in Oxford, from whom ...
Licht P - - 2001
Recent evidence suggests that human chorionic gonadotropin (hCG), in addition to its well-known endocrine effects on the corpus luteum, may act as a growth and differentiation factor during pregnancy. According to experimental results, its mode of action may be divided into three sequential phases. During the first phase, which begins ...
Carrell Douglas T - - 2001
Decreased periovulatory human chorionic gonadotrophin (HCG) concentrations have been shown to be associated with diminished fertilization rates. This study evaluated if intra-follicular HCG concentration may be related to body mass in 247 IVF patients using their own oocytes and 58 patients receiving donor oocytes, and evaluated if such a relationship ...
Atri M - - 2001
OBJECTIVE: We identified the potential clinical and sonographic predictors of the spontaneous resolution of ectopic pregnancies. SUBJECTS AND METHODS: We performed a prospective study of 78 consecutive patients with a transvaginal sonographic diagnosis of ectopic pregnancy who had either two consecutive quantitative measurements of their beta subunit of human chorionic ...
Kim Y B - - 2001
Bacterial polyesters have been found to have useful properties for applications as thermoplastics, elastomers, and adhesives and are biodegradable and biocompatible. Poly(3-hydroxyalkanoates) (PHAs) and poly(beta-malate) are the most representative polyesters synthesized by microorganisms. PHAs containing a wide variety of repeating units can be produced by bacteria, including those containing many ...
Kurtzman J T - - 2001
The role of human chorionic gonadatropin (hCG) in the maintenance of early pregnancy is well known. Recent data suggests that hCG may play a role in the maintenance of the later stages of pregnancy as well, by directly and indirectly promoting uterine quiescence. If hCG acts as an endogenous tocolytic ...
Heikkilä A A Department of Obstetrics and Gynecology, University Hospital of Kuopio, Kuopio, - - 2001
This study was designed to investigate the association between the serum concentrations of maternal second trimester human chorionic gonadotropin (hCG) and the severity of preeclampsia. At Kuopio University Hospital, a total of 487 preeclamptic primiparas had undergone maternal serum screening for Down's syndrome between January 1993 and December 1998. Of ...
Weinans M J - - 2000
Hyperglycosylated human chorionic gonadotrophin (H-hCG), also known as Invasive Trophoblast Antigen or ITA, is a unique metabolic variant of hCG with more complex oligosaccharide side chains. Concentrations are independent of regular hCG. Urine H-hCG has recently proved to be a highly sensitive marker for Down syndrome screening in the second ...
Chaffin C L - - 2000
Peri-ovulatory progesterone plays an indispensable role in ovulation and luteinization, possibly by controlling tissue remodelling of the ovulatory follicle. This study was designed to evaluate gonadotrophin- versus progestin-mediated changes to the morphology of the follicle wall during luteinization. Ovaries were obtained from macaques undergoing ovarian stimulation either before (0 h) ...
Levgur M - - 2000
OBJECTIVE: To evaluate endometrial stripe thickness (EST) among patients with tubal pregnancy (TP) and intrauterine pregnancy (IUP). DESIGN: Historical cohort. SETTING: City hospital. PATIENT(S): Ninety-four women suspected to have TP. INTERVENTION(S): Serum betaHCG and sonographic EST measurements. MAIN OUTCOME MEASURE(S): Comparison of age, gestational age (GA), EST, and log beta ...
Ong C Y - - 2000
OBJECTIVE: To examine the value of first trimester maternal serum free beta human chorionic gonadotrophin (beta hCG) and pregnancy associated plasma protein A (PAPP-A) as predictors of pregnancy complications. DESIGN: Screening study. SETTING: Antenatal clinics. POPULATION: Singleton pregnancies at 10-14 weeks of gestation. METHODS: Maternal serum free beta hCG and ...
Spencer K - - 2000
We have studied changes in first trimester fetal nuchal translucency (NT) and maternal serum free beta-hCG and PAPP-A with gravidity and parity in 3252 singleton pregnancies unaffected by chromosomal abnormality or major pregnancy complications. We have shown that gravidity and parity is associated with a small but progressive decrease in ...
Sunder S - - 2000
Current research suggests that the appearance of endometrial integrins and pinopode appearance signal the opening of the receptive phase of the endometrium. These integrins may be activated by the interleukin-1 system (IL-1). IL-1beta, expressed by the blastocyst, induces vascular endothelial growth factor (VEGF) which, in turn, promotes angiogenesis and integrin ...
Yaman C - - 2000
OBJECTIVE: To evaluate the role of three-dimensional (3D) ultrasonographic measurement of the endometrium in predicting pregnancy in an IVF-ET program. DESIGN: Prospective study. SETTING: Center for assisted reproductive techniques. PATIENT(S): 65 women undergoing controlled ovarian hyperstimulation for IVF. INTERVENTION(S): Ultrasonographic examination on the day of hCG administration. MAIN OUTCOME MEASURE(S): ...
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