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Results 501 - 550 of 680
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Jimenez C - - 1997
OBJECTIVE: To assess whether sperm recovered from postejaculatory urine and cryopreserved can be used successfully for intracytoplasmic sperm injection (ICSI). DESIGN: Case report. SETTING: Laboratory of Developmental and Reproductive Biology, University Hospital. PATIENT(S): A couple with male infertility resulting from complete retrograde ejaculation. INTERVENTION(S): Freezing of sperm recovered from urine ...
Castellotti D S - - 1997
OBJECTIVE: To present a successful transfer of microhatched embryos to the fallopian tubes via microlaparoscopy. DESIGN: Case report. SETTING: Private practice affiliated with a medical university. PATIENT: A 40-year-old woman with primary infertility, mildly elevated baseline FSH levels, and a history of poor ovarian response to ovulation induction. Her husband ...
Meng L - - 1997
Genetically identical nonhuman primates can provide a powerful animal model for gene therapy and research activities where the physiological parameters directly or indirectly under study are heritable. Here we demonstrate that nuclear transfer is a viable technology for the production of identical rhesus macaques. Oocytes recovered from gonadotropin-treated females were ...
Bedford J M - - 1997
The gametes of the least shrew, Cryptotis parva, were studied in regard to their maturation and structure, and with particular emphasis on their behavior in the fallopian tube, from the time of ovulation until the appearance of two-cell embryos beginning some 9 h after ovulation. Cryptotis spermatozoa are organized according ...
Godfrey R W - - 1997
Two trials were conducted to evaluate the efficacy of oestrous synchronisation procedures in St. Croix White, Barbados Blackbelly hair and Florida Native wool ewes. In Trial 1 (conducted in June), 27 ewes were treated with controlled internal drug release (CIDR) devices for 12 days (CIDR1) and 29 untreated ewes served ...
Edirisinghe W R - - 1997
This case report describes the birth of a baby following the transfer of cryopreserved embryos generated from intracytoplasmic sperm injection (ICSI) carried out on the second day after oocyte pick-up of in-vitro-matured metaphase I and germinal vesicle stage oocytes. The couple had a history of three failed intrauterine insemination attempts ...
Soley J T - - 1997
Nuclear condensation during spermiogenesis in the ostrich follows the basic pattern established in other vertebrates. The fine granular nuclear substance of early spermatids is gradually replaced by numbers of coarse dense granules which appear to arise by aggregation of smaller dispersed elements of the chromatin. The granules increase in size ...
Dominko T - - 1997
The effect of maturational state of bovine oocytes at the time of insemination on early embryo development and the sex ratio of developing embryos was evaluated. Early maturing oocytes were inseminated either immediately after the first polar body extrusion or insemination was delayed for 8 h. Most of the zygotes ...
Nurmahmudi - - 1997
In this study, different methods of 0.2 M or 0.3 M CaCl2 delivery into hot-boned spent Leghorn breast fillets followed by tumbling were evaluated. The CaCl2 was delivered by adding 10% (wt/wt) solution into the tumbler, injection 10% (wt/wt) into the fillet, or soaking at room temperature for 15 min ...
Woods K L - - 1997
The goal of these experiments was to determine the effects of CaCl2 and NaCl injections on spent fowl meat tenderness and oxidative stability. Two hundred spent Leghorn hens were used in this two-part study. In the first experiment, breast fillets from 160 spent Leghorn hens were harvested immediately after death, ...
Donders G G - - 1997
BACKGROUND: Syphilis remains a major cause of premature birth, fetal and perinatal death, and congenital syphilis in South Africa, despite systematic antenatal screening by rapid plasma reagin and treatment with 2.4 million U of benzathine penicillin G. GOAL: To determine whether one injection of 2.4 million of U of benzathine ...
Adams C F - - 1996
We observed the effect of the 5-hydroxytryptamine synthesis inhibitor p-chlorophenylalanine on aggression in male firemouth cichlids (Cichlasoma meeki). p-Chlorophenylalanine-treated firemouths showed a significantly greater number of mirror-directed bites as compared with saline-injected controls. This finding is consistent with the effects of this drug on social aggression in mammals and birds ...
Hornung M W - - 1996
Use of fish-specific toxic equivalency factors (TEFs) to estimate the risk that exposure to polybrominated dibenzo-p-dioxins (PBDDs), dibenzofurans (PBDFs), and biphenyls (PBBs) pose to fish early life stage survival depends on validation of the hypothesis that these chemicals act additively to produce mortality. A rainbow trout early life stage bioassay ...
Ford-Jones E - - 1996
To determine the prevalence of infection with toxoplasmosis by country of birth and age in a sample of convenience. Banked sera and the computerized data base of demographic and other factors from an earlier epidemiological study were retrieved. Thirty-eight infant-toddler day care centres in Toronto. Day care providers from whom ...
Saha S - - 1996
In the present study, IVF bovine embryos were vitrified using as the cryoprotectants, ethylene glycol plus trehalose plus the polymer, polyvinylpyrrolidone (PVP). In Experiment I, toxicity of the vitrification solution (VS) containing 20% PVP was tested in relation to temperature and exposure time. One hundred percent embryo development was observed ...
Kraushar M F - - 1996
To prevent accidental intraocular injection after inadvertent single needle perforation of the eyeball, the authors recommend moving the needle and watching for corresponding movement of the globe following peribulbar or retrobulbar placement of the needle and prior to injecting. The authors have found this technique to be safe and reliable, ...
Walker M K - - 1996
Use of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) toxicity equivalents concentration (TEC) assumes that polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), and biphenyls (PCBs) act additively and via a common mechanism to cause toxicity. To test these assumptions, 11 TCDD-like congeners and three non-TCDD-like congeners were combined at ratios typically found in Lake Michigan lake trout. ...
Nestor K E - - 1996
Japanese quail lines were divergently selected for 4-wk BW (HW and LW lines) and plasma yolk precursor [total plasma phosphorus (TPP); HP and LP lines] for 30 generations. The base population was a randombred control line (R1) that was maintained along with the selected lines. Sublines were established from the ...
Brown C R - - 1996
1. The ostrich industry in South Africa (and elsewhere) experiences a high rate of embryo mortality during artificial incubation of eggs. Most of this mortality takes place in the last l0-l4 d of incubation. 2. We carried out post-mortem examinations on 111 embryos that died within this period to assess ...
Irvine S - - 1996
OBJECTIVE: To determine whether the quality of semen has changed in a group of over 500 Scottish men born between 1951 and 1973. DESIGN: Retrospective review of data on semen quality collected in a single laboratory over 11 years and according to World Health Organisation guidelines. SETTING: Programme of gamete ...
Claeys D - - 1996
Human type A chronic gastritis or autoimmune gastritis (AIG) is associated with gastric H,K-ATPase-specific autoantibodies (HKAb). The pathogenic role of the HKAb and the triggering autoantigen(s) are unknown. In a mouse model, neonatal thymectomy (nTx) induces AIG, which is likely T cell mediated, although HKAb are always present. Our aim ...
Shalika S - - 1995
The purpose of this study was to determine the effects of a simplified 80% Mono-Percoll sperm separation procedure on both normal and male factor semen samples compared with the standard swim-up technique. The parameters examined include sperm concentration, motility and morphology, total motile functional spermatozoa and percentage recovery. Normal patients ...
Zabel E W - - 1995
Fish-specific toxic equivalency factors (TEFs), which relate the toxic potency of polyhalogenated aromatic hydrocarbons (PHAHs) to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) based on the endpoint of early life stage mortality, have been used in assessing the risk to fish early life stage survival of complex mixtures of PHAHs in feral fish eggs. Use ...
Ng E - - 1995
PURPOSE: A higher proportion of male offspring has been observed after transferring faster-developing embryos in a number of animal species. Therefore, we evaluated the correlation between the sex ratio of delivered babies and the cleavage stage of transferred embryos in a human IVF-ET program. METHODS: The sex of infants born ...
Patrizio P - - 1995
OBJECTIVE: To assess if epididymal sperm cryopreserved 24 hours after exposure to oocytes in conventional IVF can be successfully used for intracytoplasmic sperm injection (ICSI) in a subsequent cycle. DESIGN: Case report. SETTING: University of California, Irvine, Center for Reproductive Health. PATIENTS: Two men with obstructive azoospermia requiring microsurgical epididymal ...
Warkentin K M - - 1995
The life histories of many animals are characterized by niche shifts, the timing of which can strongly affect fitness. In the tree frog Agalychnis callidryas, which has arboreal eggs, there is a trade-off between predation risks before and after hatching. When eggs are attacked by snakes, tadpoles escape by hatching ...
Fujii S - - 1995
The NC-eob mice are mutants having open eyelids at birth with complete penetrance. Detailed scanning electron microscopy and light microscopy for study of the eyelid development of NC-eob embryos/fetuses were performed at days 13 to 17 of gestation and compared with normal NC mice, with the aim of investigating the ...
Puri P - - 1995
Fifty-two infants (75 ureters) with primary high-grade vesicoureteric reflux (VUR) treated endoscopically by subureteric injection of Polytef paste (STING) were followed up for 1-9 years. There were 30 boys and 22 girls and their ages ranged from 2 to 12 months. Forty-five percent of ureters had grade III VUR, 40% ...
Eid L N - - 1994
The objective of this study was to determine whether the initiation and length of the zygotic S-phase differs for embryos sired by bulls demonstrating high versus low fertility in vivo. Bovine oocytes were matured in vitro for 24-27 h and fertilized with frozen-thawed bovine semen. Six bulls that differed in ...
De Wolf D - - 1994
Adenosine is an endogenous nucleoside acting on coronary perfusion and myocardial conduction. Although the anti-arrhythmic effects of adenosine have been known for decades, interest in the use of adenosine or adenosine triphosphate (ATP- a precursor of adenosine) in termination of supraventricular tachycardia (SVT) has been renewed. We studied the use ...
Anderson S - - 1994
Butylated hydroxytoluene is an antioxidant that has antiviral properties and sustains sperm viability during freezing and thawing. A field trial involving 11 bulls and 19,000 AI was conducted to determine whether addition of .5 mM butylated hydroxytoluene to whole milk extender during seminal processing affected bull fertility as estimated by ...
French N A - - 1994
1. Turkey eggs were incubated at 36.5, 37.5 and 38.5 degrees C. The age of mortality, the incidence of malpositions and the incidence of morphological abnormalities were recorded from all unhatched eggs. 2. Eggs incubated at 36.5 degrees C hatched later than eggs incubated at 37.5 degrees C but did ...
Check J H - - 1994
Two centers have independently reported a higher rate of male to female births following insemination of sperm prepared by a modified swim-up technique. The principle of the modified swim-up is that a small percentage of the x-bearing sperm are the fastest and travel to the top of the supernatant, followed ...
Matsumura M - - 1994
Myocardial mitochondrial function after acute adriamycin exposure was compared in infant and adult mice. Heart mitochondrial were isolated 48 h after an intraperitoneal injection of adriamycin. Concentrations of adriamycin in serum and heart tissue were not significantly different between infant and adult mice. Oxygen consumption (state 3 respiration), and respiratory ...
Iwanaka T - - 1994
Infants with hemangiomas of the eyelid and orbit are at risk for amblyopia and refractive errors. Several methods of treatment for these tumors have been associated with complications and limitations. Five infants with these hemangiomas were treated by intralesional corticosteroid injection combined with short-term oral prednisolone. In an attempt to ...
Anderson M - - 1994
Follicle cells were removed by dissection from early vitellogenic oocytes of the cockroach Blattella germanica. The vibrating probe was used to record steady currents from 19 defolliculated oocytes and 19 intact follicles of the same developmental stage. Defolliculated oocytes generated currents that were stable and distinguishable (by intensity or selective ...
Wada I - - 1994
The objective of this retrospective study was to compare the birth characteristics and perinatal mortality of babies conceived from the use of cryopreserved embryos with those resulting from in-vitro fertilization (IVF) and fresh embryo transfer. A total of 232 consecutive births, one pregnancy termination and a total of 283 babies ...
Bylemans D - - 1994
Injection of crude extracts of late vitellogenic ovaries into staged females of the grey fleshfly Neobellieria (Sarcophaga) bullata inhibited oocyte development and biosynthesis of trypsin-like enzymes in the gut. Trypsin synthesis in N. bullata is cyclic and is correlated with egg development, which is discontinuous. A trypsin modulating oostatic factor ...
Butler A B - - 1994
The evolution of the dorsal thalamus in various vertebrate lineages of jawed vertebrates has been an enigma, partly due to two prevalent misconceptions: the belief that the multitude of nuclei in the dorsal thalamus of mammals could be meaningfully compared neither with the relatively few nuclei in the dorsal thalamus ...
Peebles E D - - 1993
The influence of creating and closing acoustic windows on embryonic and posthatch development for the purpose of chicken embryogenesis monitoring by real-time ultrasonography (US) was evaluated at 2, 6, 9, 14, and 17 days of incubation. Acoustic windows were closed using either a porous dialysis film and tape (FM) or ...
Williams M - - 1993
This study aimed to determine the number and distribution of spermatozoa within the human Fallopian tubes around ovulation. Parous women, undergoing total abdominal hysterectomy for menorrhagia, were inseminated with either partner's semen (3/10) or donor semen (7/10). Approximately 18 h later both Fallopian tubes were ligatured into ampullary, isthmic and ...
Halling A - - 1993
Neonatal female mice of the NMRI strain were treated s.c. with 5 micrograms of the synthetic oestrogen diethylstilboestrol (DES) or vehicle only (olive oil; controls) for the first 5 days after birth. Embryos at the two-cell stage from control females were transferred to the oviducts of control females or DES-treated ...
Gunn T M - - 1993
The SELH/Bc (SELH) inbred stock of mice has a high liability to the neural tube closure defect, exencephaly. All SELH embryos close their cranial neural tubes by an abnormal mechanism, lacking elevation and initiation of fusion in the posterior prosencephalon/anterior mesencephalon region. Most embryos complete closure of the cranial neural ...
Martinez-Alos S - - 1993
The paired vitellaria of the parasitic plathelminth Dicrocoelium dendriticum are composed of numerous follicles each of which contains vitellocytes at different stages of maturation and is enveloped by a basal lamina-like structure and a cytoplasmic sheath. The differentiation process of vitellocytes has been subdivided into three stages on the basis ...
Bregengaard C - - 1993
Tissue factor pathway inhibitor (TFPI) is a feed back inhibitor of the initial activation of the extrinsic pathway of coagulation. In humans, injection of heparin results in a 2-6 fold increase in plasma TFPI and recent studies suggest that TFPI may be important for the anticoagulant activity of heparin. Full ...
Stiekema J C - - 1993
1. The anti-clotting effects after intravenous administration of three low molecular weight (LMW) heparins, Fragmin (KABI 2165), Fraxiparine (CY 216), Clexane (PK 10169) and the LMW mixture of glycosaminoglycuronans Orgaran (Org 10172) were compared in a randomized cross-over study in 12 healthy male volunteers. 2. The time courses of the ...
Schenker J G - - 1993
There are potential interventions in the pre-embryo stage in order to improve the clinical results of assisted reproductive technology, live-birth per cycle of treatment, and to prevent the birth of offspring with genetic aberrations. The following therapeutic measures can be potentially applied to the pre-embryo: improvement of culture conditions, pre-embryo ...
Miyoshi H - - 1993
The rebleeding rate after endoscopic injection sclerotherapy was studied in 237 patients with esophageal varices, and the optimal outcome of treatment was determined. Two new categories, RC(2-) and F0, were added to the classification scheme of endoscopic findings of varices in Japan. RC(2-) represents a state in which no veins, ...
Tan H S HS Department of Physiology I, Faculty of Medicine, Erasmus University Rotterdam, The - - 1993
It has been proposed that a common velocity-storage mechanism is responsible for the prolongation of vestibular nystagmus beyond the duration of the change in firing frequency of primary vestibular fibers in response to a step in velocity, and for the production of optokinetic afternystagmus (OKAN). In a previous study, bilateral ...
Young T J - - 1992
165 college students completed a survey containing a measure of misconceptions about human aggression and attitudinal items on the death penalty from a 1985 Gallup report. Analysis did not provide strong support for the hypothesis that subjects with relatively high numbers of misconceptions about human aggression are more likely than ...
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