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Fazeli Alireza - - 2008
Maternal communication with gametes and embryos influences a broad range of events crucial to pregnancy. Events such as final maturation of gametes, gamete transport, fertilization, early embryonic development and development of foetus to term, are all dependant upon the relay of appropriate molecular signals between the mother, gametes and embryos. ...
Pallares Pilar - - 2008
The current study aimed to determine effects of deficiencies in nitric oxide synthase (NOS) 3 on embryo and fetal development by in vivo, noninvasive, real-time ultrasonographic assessment of phenotypic changes in Nos3-knockout pregnant mice and their wild-type counterparts. From Day 4.5 of pregnancy onwards, embryonic vesicle diameters, crown-rump lengths, and ...
Trousdale Rhonda K - - 2009
To compare the efficacy of recombinant human FSH (rhFSH) with rhFSH with four additional O-linked carbohydrates (rhFSH-CTP), rhFSH with four additional N-linked carbohydrates (rhFSH-N4), and the current gold standard for rodent ovarian stimulation, pregnant mare serum gonadotropin (PMSG), on fertility parameters in mice. Animal study. Academic research center. Adult C57Bl/6J ...
Fan Yongliang - - 2008
Cuticular hydrocarbons of arthropods serve multiple functions, including as barriers to water loss and as pheromones and pheromone precursors. In the oviparous German cockroach, Blattella germanica, long-chain hydrocarbons are produced by oenocytes within the abdominal integument and are transported by a blood lipoprotein, lipophorin, both to the cuticular surface and ...
Gerritsen R - - 2008
During lactation, daily separation of sow and piglets, intermittent suckling (IS), can induce lactational oestrus and ovulation. This study examined effects of IS on subsequent early embryo survival and development. Multiparous Topigs40 sows were separated from their piglets for either 12 consecutive hours per day (IS12, n = 13) or ...
Scherzer J - - 2008
Embryo transfer has been an inherent part of cattle breeding for more than 35 years and has also gained remarkable interest from the equine industry after several breeds allowed registration of more than one foal per year. In both large animal species, non-surgical embryo recovery and transfer are well-established techniques. ...
Tober Joanna - - 2008
Hematopoiesis initiates within the yolk sac of mammalian embryos in overlapping primitive and definitive waves, each containing erythroid and megakaryocyte progenitors. c-myb-null mouse fetuses lack definitive erythrocytes but contain primitive erythroblasts and hepatic megakaryocytes. However, it is unclear if c-myb-null embryos harbor definitive erythroid or any megakaryocyte progenitors. We determined ...
A. Shirazi
Ovine embryos were produced by maturation, fertilization and <I>in vitro</I> culture (IVM/IVF/IVC) of oocytes collected from slaughtered prepubertal ewes. At 24 h post IVM, oocytes were fertilized with fresh semen collected from Lori-Bakhtiari breed at a concentration of 1.0x10<SUP>6</SUP> sperm mL<SUP>-1</SUP>. The presumptive ova/embryos were transferred into the embryo culture ...
Fauque Patricia - - 2008
The case of a successful pregnancy is reported here, following intracytoplasmic sperm injection which resulted in a cohort of embryos showing accelerated cleavage kinetics. Pregnancy was not achieved with fresh embryos transferred at the 4-cell stage but was achieved with cryopreserved accelerated embryos. After an ovarian stimulation cycle, 20 mature ...
Larocca Luciana - - 2008
Neuroimmune-endocrine interactions seem to be central to the dialogue between the mother and the growing embryo during normal pregnancy. A proinflammatory Th1 microenvironment appears to be associated with embryo implantation but an excess of these cytokines may be deleterious. When normal gestation is subjected to stressful stimuli as those provided ...
Malone J F - - 2008
The ethical basis for many medical practices has been challenged over the last two decades. Radiology has seen enormous growth during the same period. Many practices and equipment types, now commonplace, did not exist a generation ago. Yet the fundamental ethical basis for these practices has not seen a corresponding ...
Leese Henry J - - 2008
The oviduct and uterus provide the environments for the earliest stages of mammalian embryo development. However, little is known about the mechanisms that underlie the formation of oviduct and uterine fluids, or the extent to which the supply of nutrients via these reproductive tract tissues matches the nutrient requirements of ...
Serour G I - - 2008
Assisted reproductive technology is widely practised around the world for the treatment of virtually all forms of infertility. The application of this technology in the Islamic world had been delayed for many years, based on the misconception that Islamic teachings do not approve assisted reproduction. The paper discusses derivation of ...
Downs Karen M - - 2008
The human fertilized egg is not an embryo, but, more accurately, a conceptus, which contains all the information required to establish both the embryo and extraembryonic supporting tissues. The fertilized eggs of placental mammals, including humans, are entirely dependent upon the female's uterine environment for development to birth. At least ...
De Silva P H P R - - 2008
A method was developed for the rearing of coconut mite, Aceria guerreronis Keifer (Acari: Eriophyidae), and its predatory mite Neoseiulus baraki (Athias-Henriot) (Acari: Phytoseiidae) on embryo culture seedlings of coconut (Cocos nucifera) in the laboratory. Seedlings in the ages of <2, 2-4 and 4-6 months were infested with 75 field-collected ...
Foerster Katharina - - 2007
PROBLEM: FGL2 prothrombinase is required for spontaneous abortion (resorptions) in the CBA x DBA/2 model, and for abortions in C57Bl/6 (B6) mice triggered by Salmonella enteritidis lipopolysaccharide (LPS). Unlike abortions, occult losses in B6 mice, which begin before gestation day 9.5 in mice, do not require the tumor necrosis factor-alpha ...
Ehrich K - - 2007
This paper stems from an ethnographic, multidisciplinary study that explored the views and experiences of practitioners and scientists on social, ethical and clinical dilemmas encountered when working in the area of PGD for serious genetic disorders. We focus here on staff perceptions and experiences of working with embryos and helping ...
Lahnsteiner F - - 2008
The study investigated the effects of internal (DMSO, 1,2-propanediol, glycerol, ethylene glycol, methanol, N,N-dimethylacetamide) and external cryoprotectants (glucose, sucrose) on the viability and on morphometric parameters of zebrafish embryos. From the tested internal cryoprotectants, DMSO had the lowest toxicity, followed by 1,2-propanediol and glycerol. The external cryoprotectants were less toxic ...
Chebel R C - - 2008
Our objective was to evaluate factors that affected the success of embryo transfer programs in large dairy herds. Non-lactating donor cows produced a larger number of ova/embryos (P<0.01) and viable embryos (P<0.01) than lactating cows. The interaction between season and donor class was correlated with the proportion of ova/embryos classified ...
Berveiller Paul - - 2008
Cervico-isthmic pregnancy is a rare form of ectopic pregnancy with a poor obstetrical prognosis, whose mechanism remains unclear. Preclinical data indicate that HER-2 plays a major role in embryo implantation. We report a case of cervico-isthmic pregnancy occurring during treatment with trastuzumab (Herceptin, a monoclonal antibody to HER-2). A 43-year-old ...
Boareto Ana C - - 2008
Artemisinin compounds are important for treating multidrug-resistant malaria; however, the possible resorption and abnormalities observed in animal reproduction studies may contraindicate artemisinin use during the first trimester. To evaluate whether artemisinin interferes with developmental outcomes at different periods of pregnancy, Wistar rats were treated by gavage with increasing doses of ...
Watkins Adam J - - 2008
Poor maternal nutrition during pregnancy can alter postnatal phenotype and increase susceptibility to adult cardiovascular and metabolic diseases. However, underlying mechanisms are largely unknown. Here, we show that maternal low protein diet (LPD), fed exclusively during mouse preimplantation development, leads to offspring with increased weight from birth, sustained hypertension, and ...
Naruse Takuji - - 2007
PURPOSE: Various combinations of central polydactyly, syndactyly, and cleft hand have been frequently observed in the individual hands and feet in the same patients. Little is known, however, about the early changes of abnormal induction of digital rays during limb development. To determine the early changes and process of formation ...
PrzystaƄska A - - 2007
The development of the mandible was traced on serial sections of 20 human embryos aged 5-8 weeks (developmental stages 13-23). Special consideration was given to the differentiation of skeletal units proposed by Sperber. The first skeletal units, namely the mandibular body, the alveolar unit and the condylar unit, may be ...
Chaouat Gérard - - 2007
Cytokines are obviously very important in an established pregnancy, but what about human embryo implantation? Literature review. We first discuss the necessity and limits of animal models, and then review the few cytokines which have been demonstrated by knock-out methods to be absolutely necessary for embryo implantation using in animal ...
Melican D - - 2008
We investigated the capability of repeat superovulation and non-surgical embryo retrieval, coupled with surgical embryo transfer, to expedite the production of transgenic progeny from transgenic founder dairy goat does. In addition, we compared embryo yields, number of embryos transferred per recipient, pregnancy rates, and offspring born during both the traditional ...
Afif A - - 2007
To describe the morphological stages of insular sulci and gyri development we carried out a macroscopical study on 21 human fetal brains, showing no anomalies, from 13 to 28 gestational weeks (GWs). Particular focus was given to morphological appearance during the development of insular and periinsular structures, especially the gyration ...
Storm Melissa A - - 2007
Selection for rapid growth and development in cold environments results in a geographic pattern known as countergradient variation. The eastern fence lizard, Sceloporus undulatus, exhibits countergradient variation in embryonic growth and development along latitudinal clines. To identify the proximate causes of countergradient variation, we compared the energy budgets of embryos ...
Presicce G A - - 2007
In this paper, an account of various aspects related to buffalo reproduction are given. Fundamental concepts of the reproductive physiology as well as manipulation of the reproductive function will be presented. This will include an overview of the most recent developments of the oestrous cycle and the ovulation control, new ...
Webster William S - - 2007
There is increasing evidence that the oxygen supply to the human embryo in the first trimester is tightly controlled, suggesting that too much oxygen may interfere with development. The use of hypoxia probes in mammalian embryos during the organogenic period indicates that the embryo is normally in a state of ...
Brison Daniel R - - 2007
Infertility affects an increasing number of couples and for many the treatment of choice is IVF. However, the success rate remains relatively low, and, as typically two or more embryos are implanted, successful pregnancy often leads to multiple pregnancies with attendant complications. The major limitation in clinical IVF is the ...
Andreatti Filho R L - - 2007
Salmonella enterica serovar Enteritidis-lysing bacteriophages isolated from poultry or human sewage sources were used to reduce Salmonella Enteritidis in vitro and in experimentally infected chicks. Cocktails of 4 different bacteriophages obtained from commercial broiler houses (CB4Ø) and 45 bacteriophages from a municipal wastewater treatment plant (WT45Ø) were evaluated. In experiment ...
Rodríguez-Dorta N - - 2007
This study evaluates the effect of coculture with goat oviduct epithelial cells (GOEC) on the pregnancy rate, embryo survival rate and offspring development after direct transfer of vitrified/thawed caprine in vitro produced (IVP) embryos. Oocytes were recovered from slaughterhouse goat ovaries, matured and inseminated with frozen/thawed capacitated semen, and presumptive ...
Mateusen B - - 2007
The aim of the present study was to assess the effects of porcine circovirus type 2 (PCV2) on porcine embryos and their receptor sows during the first 21 days of pregnancy. Hatched blastocysts exposed to 10(5.0) TCID50 PCV2 per ml (strain 1121, fifth passage PK15) and negative control embryos were ...
Hoogendijk, C F; ;
Objective. A comparative study of embryo quality and pregnancy outcome between Sydney IVF medium and Quinn's Advantage sequential culture media. Design. A prospective randomised controlled trial and a retrospective study. Setting. In vitro fertilisation clinic in an academic research environment. Patients. All women < 38 years undergoing fresh embryo transfers. ...
Malhi Pritpal S - - 2007
The study was designed to test the hypothesis that aging in cattle is associated with reduced developmental competence of oocytes. The hypothesis was tested by comparing embryo production and pregnancy rates between 13- to 16-year-old cows (n = 6 in Year 1 and n = 9 in Year 2) and ...
Osman Alaa G M - - 2007
The effect of lead exposure (100, 300, and 500 microg/L lead nitrate) on embryos of the African catfish Clarias gariepinus were examined by gross morphology and histopathology. Exposition to lead nitrate caused a progressively longer delay in hatching and also reduced the percentage of embryos, which successfully completely hatch from ...
Melo Marco Antonio Barreto - - 2008
OBJECTIVE: To evaluate the embryo quality in our program for human immunodeficiency type-1 virus (HIV-1) serodiscordant couples (SDCs) with the male infected in comparison with a tubal-factor infertility control group. DESIGN: Retrospective case-control study. SETTING: Instituto Valenciano de Infertilidad, Valencia, Spain. PATIENT(S): Thirty SDC and 79 control couples without HIV-1 ...
Ziebe Søren - - 2007
BACKGROUND: There are limited data on the impact of different gonadotrophin preparations on embryo quality. METHODS: This evaluation was part of a randomized, assessor-blind, multinational trial, conducted in 731 women undergoing IVF after stimulation with highly purified human menopausal gonadotropin (HP-hMG; MENOPUR) (n = 363) or recombinant FSH (rFSH; GONAL-F) ...
Sun Zhao-gui - - 2007
BACKGROUND: The study was conducted to investigate the inhibitory effect of 4-(2-aminoethyl)benzenesulfonyl fluoride hydrochloride (AEBSF) on embryo implantation in mice with a view to identifying whether it might be a suitable agent for postcoital contraception. STUDY DESIGN: The anti-implantation efficacy of AEBSF was determined by counting the number of visible ...
Taylor A H - - 2007
Maternal use of marijuana, in which the exocannabinoid Delta(9)-tetrahydrocannabinol is the most active psychoactive ingredient, is known to have adverse effects on various aspects of reproduction including ovulation, spermatogenesis, implantation and pregnancy duration. Endogenous cannabinoids of which Anandamide is the prototype are widely distributed in the body especially in the ...
Alomar M - - 2008
The between bulls variation in in vitro fertility and the shift of sex ratio towards male embryos are two problems affecting the in vitro production (IVP) of bovine embryos. Our objective was to evaluate the kinetics of fertilization, embryo development and the sex ratio of the resulting embryos using the ...
Vandelook Filip - - 2007
BACKGROUND AND AIMS: The European Chaerophyllum temulum and two North American Chaerophyllum species have a trans-Atlantic disjunct distribution. This work aimed to resolve requirements for dormancy break and germination of C. temulum seeds and to compare dormancy traits with those of the two North American congeners. METHODS: Phenology of germination ...
Miura Shigeto - - 2007
To assess the function of the distal visceral endoderm (DVE) of embryonic day 5.5 (E5.5) embryos, we established a system to directly ablate the DVE and observe the consequences after culture. When the DVE was successfully ablated, such embryos (DVE-ablated embryos) showed deregulated expression of Nodal and Wnt3 and ectopically ...
Dentillo D B - - 2007
Pregnancy loss can be caused by several factors involved in human reproduction. Although up to 50% of cases remain unexplained, it has been postulated that the major cause of failed pregnancy is an error of embryo implantation. Transmembrane mucin-1 (MUC-1) is a glycoprotein expressed on the endometrial cell surface which ...
Biehlmaier Oliver - - 2007
PURPOSE: To characterize morphologic and physiological alterations in the retina of three laminin mutant zebrafish, bashful (bal, lama1), grumpy (gup, lamb1), and sleepy (sly, lamc1), which were identified in forward genetic screens and were found to be impaired in visual functions. METHODS: Mutant larvae were observed for defects in visual ...
Betteridge K J - - 2007
Carl Hartman's title of 47 years ago is invoked in tribute to his first recovery of a bovine embryo 30 years before that, and his legacy of an emphasis on the value of descriptive and comparative studies in reproductive biology. The horse's qualification as a farm animal has waned since ...
Luna Martha - - 2008
OBJECTIVE: To evaluate developmental potential of fast cleaving day 3 embryos. DESIGN: Retrospective analysis. SETTING: Academic reproductive center. PATIENT(S): Three thousand five hundred twenty-nine embryos. INTERVENTION(S): Day 3 embryos were classified according to cell number: slow cleaving: <or=6 cells, intermediate cleaving: 7-9 cells, and fast cleaving: >or=10 cells, and further ...
Wendler Christopher C - - 2007
Embryos can be exposed to environmental factors that induce hypoxia. Currently, our understanding of the effects of hypoxia on early mammalian development is modest. Potential mediators of hypoxia action include the nucleoside adenosine, which acts through A(1) adenosine receptors (A(1)ARs) and mediates adverse effects of hypoxia on the neonatal brain. ...
Thundathil J - - 2007
Since the high prevalence of bovine tuberculosis and brucellosis in free-ranging wood bison in the Canadian north poses a threat to nearby healthy bison populations, commercial bison and cattle ranches, and potentially to humans, there is considerable impetus to salvage the genetics of infected bison and maintain a disease-free herd. ...
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