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Showing 1 to 20 of 39 for “"Conceptus"”.
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Conceptus-derived Fibrinogen and its Implication in Equine Pregnancy
The equine conceptus presents an extensive mobile stage from days 9 to 16 after ovulation, during which it becomes fixed to one of the uterine horns. Throughout mobility, the conceptus secretes fibrinogen (an integrin-binding ECM). We hypothesized that conceptus-derived fibrinogen is converted into …
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Biological role of conceptus derived factors during early pregnancy in ruminants
… dysfunction, or asynchrony between the conceptus (embryo and trophectoderm) and uterus. During early pregnancy in sheep, endometrial functions are primarily regulated by ovarian progesterone (P4) and interferon tau (IFNT) from the conceptus trophectoderm. In addition to IFNT, the …
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Effects of intrauterine dynamics on steroidogenesis and conceptus development in the porcine
… swine. Two studies were conducted to examine: 1) conceptus development and in vitro steroidogenic capability of three regions of the placenta (middle, inner, polar) at d 30, 50, 70, and 90 of gestation; and 2) the effects of intrauterine position and fetal sex on conceptus development and in vitro …
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Intrauterine position in pigs: effects on conceptus development and fetal fluids steroid content
… its possibly resultant steroid differential on conceptus growth and steroid content in allantoic and amniotic fluid of pigs. six conceptus variables (placental weight, placental length, fetal weight, fetal length, allantoic fluid volume and amniotic fluid volume) and seven steroids …
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The Effect of the Conceptus on Endometrial Angiogenesis and Immune Cell Populations During Implantation
… of key bi-directional communications between the conceptus and uterus that may be required for successful pregnancy. Amazingly, some common aspects of this signaling might exist to some extent between mammalian species that have very different modes of implantation and where quite different …
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Factors affecting growth of the conceptus in lactating dairy cows and non-lactating dairy heifers
… significantly affected the growth rate of the conceptus. Insulin and insulin-like growth factor 1 (IGF1) also had a lesser effect on rate of conceptus growth. Normal embryonic growth was observed to occur in two separate manners. The first being slower initial growth with increased late growth. …
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Role of conceptus-induced vasodilation in controlling utero-ovarian function of ewes, cows and sows
… elevated (P < 0.05) until Day 21. Estrogens of conceptus origin may increase uterine and ovarian BF, but the function of PSVN is not reduced during early pregnancy. Increases in uterine and ovarian BF may enhance transport of a conceptus-induced luteotropin, such as PGE(,2), to the CL-bearing …
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The Influence of Preovulatory Estradiol on Uterine Transcriptomics and Proteomics Around Maternal Recognition of Pregnancy in Beef Cattle
… maternal uterine environment and the developing conceptus can greatly impact pregnancy success or loss. The objective of this dissertation is to determine the effects of preovulatory estradiol exposure on uterine and trophectoderm transcriptomes, and uterine luminal fluid (ULF) protein …
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The Effects of Preovulatory Estradiol on the Uterine Environment and Conceptus Survival From Fertilization to Maternal Recognition of Pregnancy
… estradiol on the uterine environment and conceptus survival from fertilization to maternal recognition of pregnancy. Beef cows/heifers were synchronized with the CO-Synch protocol and AIed (d 0). Cows were classified by estrus expression (estrus and no estrus), and uteri were flushed to …
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Characterization of pregnancy-associated glycoproteins and progesterone as a predictor of twins and conceptus loss in high-risk pregnancy Holstein cows
Pregnancy loss is a multifactorial condition that compromises reproductive performance in dairy operations. Despite the high oocyte fertilization rate in dairy cows, only 28 % of those maintain a pregnancy to term. Pregnancy loss is estimated to cost U$600.00 per case. Identification of cows losing …
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An assessment of the effects of dietary folic acid supplementation on serum folates status, conceptus development and reproductive performance in gilts and sows
… acid supplementation on serum folate status, conceptus development and reproductive performance in gilts and sows was investigated in a series of experiments. The specific objectives of the study were to: 1) to study the serum folates profile following rapid consumption of a single meal …
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Porcine intrauterine steroidogenesis: luteal vs. intrauterine progesterone as a mediator of prenatal survival, conceptus development and in vitro steroid production by the placenta and endometrium
… pregnancy, normal fetal survival rates, normal conceptus development, and typical plasma estrogens when compared to intact, control gilts. In chapter 4, intrauterine steroid synthesis was quantitated by incubating placenta (PLAC) and endometrium (ENDO) from the control and MPA-treated gilts of …
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Identification of a Gonadotropin Releasing Hormone-Like Factor in the Rabbit Placenta (Pregnancy, Corpus Luteum, Fetus)
… controls. Next we determined the effect of conceptus (fetus and fetal placenta) removal at days 11, 12 and 18 on maternal serum P(,4) and LH levels. Serum P(,4) and LH profiles of does whose conceptuses were removed on d 11 were identical to pseudopregnant controls. Conceptus removal on d 12 …
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An assessment of the effects of dietary oil supplementation on fetal survival in gilts at 40 days of gestation
… fatty acid profile of plasma of gilts and the conceptus tissues were similar; both were influenced by the fatty acid concentration of the diets. The ratio of n-3/n-6 fatty acids was higher in conceptus tissue than in maternal plasma and the ratio was higher (P < .05) for the fish oil diet …
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Clinico-Chemical Parameters of Fetal Fluids and Maternal Blood in the Bovine Model: Effects of Genetics and Sex and Relationships with Feto-Placental Phenotype
… phenotype, and (iv) the effects of conceptus sex and genetics on maternal blood parameters. Purebred and reciprocal cross Bos taurus, (Bt) and Bos taurus indicus, (Bi) concepti were recovered in early gestation (Day 48, n = 60), and midgestation (Day 153, n = 72), (term ~ 280 days). …
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Manipulating Embryonic Development and Endometrial Function in Ruminants
… of maternal obesity on the preimplantation conceptus and endometrium. Exposure to maternal obesity in utero affects offspring development at the postnatal, adolescent, and adult stages of development; however, its impacts on early embryogenesis are not well studied. This work utilized an …
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Strategies for improving reproductive performance in gilts
… corpus luteum function and the effect on early conceptus development, gilts were assigned to HS or thermal neutral (TN) conditions and either received altrenogest (a progesterone receptor agonist) supplementation or a control group that was not supplemented. Corpus luteum weight was affected by …
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Identification and characterization of luteotrophic activity in the rabbit placenta
… luteum of the rabbit requires estrogen and the conceptus to maintain progesterone production throughout pregnancy. The factor produced by the fetal placenta which is responsible for maintaining progesterone production has not been conclusively identified. Therefore, the focus of this thesis was …
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Regulation of Serum and Ovarian Relaxin Levels and Corpus Luteum Function During the Second Half of Pregnancy in the Rat (Ovary, Birth, Gestation)
… of relaxin in the pregnant rat. The role of the conceptus in regulating relaxin synthesis and secretion was examined by investigating the effects of conceptus number on serum and ovarian relaxin levels, as well as on serum progesterone (P4) levels and CL weights. A direct relationship between the …
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DNA Methylation Landscape of the Fibrinogen Gene Cluster in the Equine Embryo
… was to contribute to the characterization of conceptus-derived fibrinogen at the time of fixation. We confirmed early embryo expression in the absence of hepatic activity, as well as describe expression by the later fetal-placenta. We characterized DNA methylation across the fibrinogen gene …
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