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Showing 1 to 20 of 175 for “"Insemination"”.
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Cervical artificial insemination in sheep
… reported from a fresh semen cervical artificial insemination trial in April 1989 at the Lincoln College Research Farm. One hundred and ninety Coopworth ewes were inseminated over 5 days. Semen was collected twice daily from four Dorset Down rams using an artifical vagina (A.V.). Fixed-time …
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Strategies to improve artificial insemination by donor
Artificial insemination with donor sperm is a widely accepted form of treatment for severe male factor infertility. The introduction of quarantined, cryopreserved semen and the associated reduction in cycle fecundity when compared to fresh semen necessitated the development of strategies to improve …
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Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers
Objectives were to evaluate time of insemination relative to estrus and synchronization with melengestrol acetate (MGA) plus prostaglandin (PG) or progesterone insert (CIDR) plus PG on AI pregnancy rate in beef heifers (n = 662) during Fall or Spring. Fall heifers (n = 349) received MGA-PG (MGA for …
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The Influence of Artificial Insemination in Three Midwestern States
… It is important that sires in artificial insemination be of genetic value superior to the population average. This is imperative when it is realized that through artificial insemination, a sire can be mated to many more cows than he could be naturally and over a much greater area. However, …
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The physiological significance of insemination in programming pregnancy outcome
… GM - CSF and IL - 6, in the oviduct following insemination. Factors important in tissue remodelling required for implantation and angiogenesis, MMP - 2, MMP - 3 and VEGF - C, were also shown to be increased at the time of implantation after seminal plasma exposure. Additionally the generation …
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Sperm cryopreservation and artificial insemination at Groote Schuur Hospital.
The diagnosis and therapy managed by the specialities of infertile couples is traditionally of Gynaecology and Andrology. The latter is a subspeciality, which should combine the knowledge of urologists and gynaecologists in the treatment of sub or infertile men.
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Enhancing Boar Reproductive Performance for Purposes of Artificial Insemination
The objectives were to: 1) determine if im treatments of Lutalyse expedited the training of sexually inexperienced boars for semen collection and increased spermatozoal output, and 2) determine the effects of dietary L-carnitine supplementation on boar libido, semen quality, sperm production, and …
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Methods for semen analysis and intrauterine insemination: room for improvements
Contains fulltext : 232634.pdf (Publisher’s version ) (Open Access)
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Detection of the Effects of Treatment on Male Fertility by Heterospermic Insemination
Made available in DSpace on 2014-12-13T19:42:46Z (GMT). No. of bitstreams: 1 7820951.pdf: 3189674 bytes, checksum: d03edb9b5d963d859727fa41808ca0aa (MD5) Previous issue date: 1978
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Optimal time of insemination in dairy cattle identified in estrus by HeatWatch
… the information needed to accurately time insemination, thus preventing AI from obtaining its full conception rate potential. Herds (n = 17) participated in a trial designed to evaluate percent pregnant relative to various characteristics of estrus. Herds utilized HeatWatch® electronic …
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Interaction of number of boar sperm and insemination timing on fertility following induced ovulation
… in estrus and ovulation requires multiple inseminations during estrus to ensure one AI occurs close to ovulation. Induction of ovulation with a GnRH agonist after weaning improves synchrony of ovulation and allows for fixed time AI. However, the interaction between number of sperm in the AI …
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Synchronization and Resynchronization of Ovulation and Timed Insemination in Lactating Dairy Cows and Heifers
… protocols combined with timed artificial insemination (TAI) as related reproductive performance. In the first study, heifers were synchronized with CIDR inserts followed by TAI. Heifers in the estradiol cypionate (ECP) group were synchronized with a combination of ECP, CIDR, prostaglandin …
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Factors Important to the Efficiency of Artificial Insemination in Single-Ovulating and Superovulated Cattle
… important to the efficiency of artificial insemination in cattle, four studies were conducted. In the first study, the addition of cream to the inseminate was used in an attempt to increase accessory sperm number. On d 6 after insemination, 60 embryos were evaluated. The addition of cream …
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Studies of insemination and sperm storage in intra- and inter-strain crosses of Drosophila melanogaster
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Zoology, 1962
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The semen of the bull with special reference to its storage and transport for artificial insemination
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Animal Husbandry, 1948
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Psychological functioning in couples undergoing in vitro fertilisation (IVF) or donor insemination (DI) treatment for infertility
… for in vitro fertilisation (IVF) or donor insemination (DI) treatment were assessed prior to treatment and approximately 9 months later. At initial assessment, fifty-nine women were interviewed and completed self-report questionnaires assessing state and trait anxiety, depression, sex role, …
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Factors affecting the relative fertility of males determined by heterospermic insemination in vivo and in vitro
Insemination of females with mixed sperm from two or more males often results in a disproportionate number of offspring sired by each of the males. Why one male is relatively more fertile than another male as demonstrated by insemination of mixed sperm is not known. Fluorochrome labels were used to …
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Oxytocin-induced cervical dilation in sheep: mechanism of action and potential use for nonsurgical artificial insemination
Exogenous oxytocin aids in the transcervical passage of an AI pipette into the uterus of ewes, and it may be an effective adjunct to sheep AI procedures. Experiments were conducted to evaluate the effects of oxytocin on variables that may affect fertility. The results of this study indicate clearly …
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Utilization of early weaning and intrafollicular insemination as methods to improve the reproductive performance of cattle
… weaning of beef heifers and intrafollicular insemination in dairy cows. Early weaning is a proven way to induce precocious puberty in heifers. Heifers will experience more estrous cycles before breeding, which is associated with increased fertility. In this experiment, heifers were either …
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