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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"OVULATION RATE"”.
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Estimation of genetic parameters for development of alternative selection criteria for increased litter size in Rambouillet sheep
… of and genetic correlations among litter size, ovulation rate, scrotal circumference and body weight in Rambouillet sheep were estimated using REML (Restricted Maximum Likelihood) via an EM (Expectation-Maximization) type algorithm. Data were obtained from the University of Illinois Rambouillet …
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Effect of P.G. 600 on the timing of ovulation in gilts treated with Regu-mate
We previously reported that ovulation rate, but not pregnancy rate or litter size at d 30 post-mating, was enhanced by gonadotropin treatment (P.G. 600; Intervet America Inc., Millsboro, DE) in gilts fed a progestin (Regu-mate; Intervet America Inc.) compared with gilts receiving progestin alone. …
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Lowered reproduction efficiency as a correlated response to selection for increased post-weaning gain in laboratory mice
… were charted by vaginal smears and plugging rate, litter rate, and litter sizes recorded; (2) Ovulation rate was obtained by counting CL's at 3½ and 7 days after mating; (3) Fertilization rate was obtained at 3½ days after mating; (4) Pre- and early post-implantation losses were obtained at 7 …
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Feeding strategies to enhance gilt reproduction and subsequent longevity and productivity in the breeding herd
… however AD-fed gilts gained weight at a faster rate (P = 0.02) than RS gilts in experiment 2. Gilts fed AD consumed their allotments across more meals than those fed RS. Age at puberty onset was not affected by FB in any of the experiments. Further, P.G. 600 did not hasten the onset of puberty, …
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Investigation of Exogenous Gonadotropin Treatment for Prevention of Non-Infectious Infertility and for Embryo Production Using the Prepubertal Gilt as a Model
… gonadotropins for induction of estrus and ovulation, yet little data are available to indicate its value for use in pigs. Therefore, the objective of this dissertation is to determine the effective methodology for the use of porcine FSH (pFSH, Folltropin) in prepubertal gilts. Experiment 1 …
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Interaction of growth hormone and insulin-like growth factor-I in the control of steroidogenesis by cultured porcine granulosa cells
… and in an attempt to develop a way to increase ovulation rate in gilts, the effects of metabolic hormones such as growth hormone (GH), insulin or prolactin and growth factors such as insulin-like growth factor I or II (IGF-I or IGF-II) on steroidogenesis in cultured porcine granulosa cells were …
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ΤΡΟΠΟΠΟΙΗΣΗ ΤΟΥ ΑΝΟΣΟΠΟΙΗΤΙΚΟΥ ΣΥΣΤΗΜΑΤΟΣ ΤΗΣ ΑΙΓΑΣ ΓΙΑ ΑΥΞΗΣΗ ΤΟΥ ΡΥΘΜΟΥ ΑΝΑΠΑΡΑΓΩΓΗΣ
… IN INDIGENOUS DAIRY GOATS INCREASES OVULATION RATE AND LITTER SIZE.- THE INCREASE NUMBER OF OVULATED FOLLICLES IS RATHER THE RESULT OF A DECREASEIN PLASMA UNCONJUGATED PROGESTERONE LEVEL, WHILE THE TOTAL PLASMA PROGESTERONELEVEL WAS HIGHER IN IMMUNIZED THAN IN CONTROL GOATS. IT SEEMS …
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ΗΛΙΚΙΑ ΤΗΣ ΗΒΗΣ ΚΑΙ ΧΑΡΑΚΤΗΡΙΣΤΙΚΑ ΤΗΣ ΠΡΩΤΗΣ ΟΙΣΤΡΙΚΗΣ ΠΕΡΙΟΔΟΥ ΑΜΝΑΔΩΝ ΤΩΝ ΦΥΛΩΝ ΧΙΟΥ ΚΑΙ ΚΑΡΑΓΚΟΥΝΙΚΗΣ ΣΕ ΣΧΕΣΗ ΜΕ ΤΟ ΕΠΙΠΕΔΟ ΔΙΑΤΡΟΦΗΣ
… AND OESTRADIOL PROFILES AROUND SECOND PUBERTAL OVULATION WERE ALSO DETERMINED BY DAILY BLOOD SAMPLING AND OVULATION RATE WAS ASSESSED BY LAPAROSCOPY AT FOUR DEFINED OESTRUS CYCLES. ALL THE EWES LAMBS OFBOTH EXPERIMENTAL YEARS WERE BRED AT THE SECOND EXPERIMENTAL YEAR
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The influence of initial length of uterus per embryo and gestation stage on prenatal survival, development and sex ratio in the pig
… (CL) was 12.4 $\pm$ 2.34 from both ovaries. Ovulation rate was positively correlated with the length of uterine horns (r =.3769). Prenatal survival rate was highly correlated with initial allotted uterine space from 5 to 25 cm/CL (r =.95, p $$.1) and when embryos were restricted to 15 cm to …
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A chromosomal analysis of 25-day pig embryos
… those prepared from her 25-day embryos. The mean ovulation rate of the nine gilts was 11.8 ± 0.4. A total of 75 embryos were recovered, of which six were degenerating. In addition to the regressing embryos, several sites of complete embryo reabsorption were found. Prenatal losses were calculated …
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Management and nutrition of the replacement gilt.
… dependant on the efficiency of gilt management strategies as well as litter size at first farrowing; however, incidences of reproductive failures and small first litter sizes are common within cohorts of replacement gilts. Hence, this thesis had two primary aims which were addressed in four …
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Recruitment of monocytes to the pre-ovulatory ovary
<p>Ovulation is a recurring biological process that involves inflammatory reactions that degrade and restructure tissue. It requires the chemotaxis of leukocytes to the ovary to help regulate and promote these events. Hormonal signals and chemokines that are released during the peri-ovulatory …
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Methods to Synchronize Estrus, Enhance Pregnancy, and Rescue Embryos in Cattle
… resulted in a cubic effect on heifer conception rates (P < 0.02; 0 mg-60%; 1 mg-45%; 2 mg-63%; 4 mg-40%) vs a positive linear effect on cow pregnancy rates (PR) (P < 0.05; 0 mg-46%; 1 mg-53%; 2 mg-55%; and 4 mg-63%). Inclusion of a timed Al improved PR in cows not observed in estrus. There were …
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Effects of Dietary Arginine Deficiency on the Reproductive Function of the Rat
… energy deficiency. Dietary arginine was demonstrated to be required for optimal mammary growth induced by gestation or steroid hormone administration. Maternal arginine deficiency interfered with the prenatal and postnatal development of the offspring. The defects produced in utero persisted …
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Impacts of microenvironment variation during breeding and gestation on the reproduction and well-being of mature gilts
… and well-being of gilts housed individually in crates. In eight replicates, estrus was synchronized in mature gilts (n = 198) and after last feeding of Matrix were randomly assigned to a room temperature of 15 °C (COLD), 21°C (NEUTRAL) or 30 °C (HOT), and a light intensity of 11 (DIM) or 433 …
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Hormonal regulation of microRNA expression in the ovary
… and uterus, led to a drastic decrease in ovulation rate and complete infertility in female mice. To further investigate the role of miRNA in ovulation, we next investigated miRNA-212 and -132. While these two co-transcribed miRNA were highly induced by the luteinizing hormone surge …
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Genetic analyses of growth, sexual maturation, and ova production in chickens
… egg. The dw allele reduced yolk formation and ovulation rate, resulting in less erratic ovulation and lowering the incidence of defective eggs. Differences between reciprocal crosses were minor as were recombination effects for the traits measured. There was little, if any, evidence of …
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Effects of ovulation-inducing drugs on pregnancy rates of cattle in rural areas after synchronized oestrus and artificial insemination
The effect of hormones that play a role during ovulation in the cow, like oxytocin, prostaglandin F20 (dinoprost PGF20) and human chorionic gonadotropin (hCG) were used to increase the ovulation rate, therefore pregnancy rates, when injected intramuscularly at the time-of artificial insemination …
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Lamb wastage and its association with ewe body condition
… for the first three weeks for determination of ovulation rate (0, 1, 2, 3, and 4) by laparoscopy. Pregnancy rates (0, 1, 2 or more fetuses) were recorded by use of transabdominal ultrasonic scanning on 4 July (2002) and 22 July (2003). Non-pregnant ewes and ewes with 1 fetus were sent back to …
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Manipulating Embryonic Development and Endometrial Function in Ruminants
… analysis. There were no differences in pregnancy rate, ovulation rate, or pregnancies/ovulation between obese and lean animals. At an RPKM threshold of 0.2, fold-change 2, and FDR 0.05, 669 and 21 differentially expressed genes (DEGs) were identified between obese- and lean-derived endometrial …
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