insemination

..Our results indicate that female promiscuity leads to the evolution of sophisticated male sexual behaviour...

..Under both protocols, a delay of 2, 4 or 6 h in insemination showed no significant differences in the fertilization, cleavage or pregnancy rates...

..has a recognition system for spermatozoa that can detect the arrival of spermatozoa in the oviduct after insemination, resulting in alterations of the oviductal transcriptome...

..After 6 d, insemination rates were determined by detection of sperm in the spermathecae...

..Because it is not possible to control the natural mating behavior of queens, we used instrumental insemination and compared queens inseminated with semen from either a single drone (single-drone inseminated, or SDI) or 10 ..

In several animals, male genitalia create insemination wounds in areas outside the genital orifice of females...

..gambiae s.s. Thus polyandry occurred within-form in 1.7% of examined females while other multiple inseminations may be linked to processes of reproductive isolation between forms of An. gambiae...

..was used to qualify the relationship between body-condition score on a scale of 1 to 5 and risks of first insemination and pregnancy. Cows with body condition at calving < 3 had lower first-insemination risks...

..A better understanding of the highly complex processes taking place between insemination and fertilization will be necessary to improve the efficiency of conventional reproductive techniques as well ..

PURPOSE: Tripronucleate (3pn) development after conventional insemination (CONV) or ICSI was analyzed to estimate the rate of second polar body retention giving rise to 3pn formation...

..b>Insemination of eggs with Cyt-D treated spermatozoa did not change early fertilization events such as the egg cortical ..

Mating behavior and the processes of insemination and sperm transfer in the ground beetle Carabus insulicola were analyzed. C...

Sperm transfer through the epididymis, a prerequisite for insemination of cat fleas, Ctenocephalides felis (Bouché) was stimulated by exposure of unfed male fleas to juvenile hormone III residues for 3 d at 25 degrees C or exposure of ..

When females mate with different males, competition for fertilizations occurs after insemination. Such sperm competition is usually summarized at the level of the population or species by the parameter, P2, defined as the proportion of ..

..These data support the notion that male excretions of estrogens may in part mediate novel-male-induced pregnancy disruptions, although other influences of aromatization on behaviour and metabolism remain possibilities...

..Results of this prospective longitudinal study on 570 normospermic men suggest that the time of day that a sample is produced does not have an influence on semen parameters...

b>Insemination elicits inflammatory changes in female reproductive tissues, but whether this results in immunological priming to paternal antigens or influences pregnancy outcome is not clear...

..Based on this knowledge, patterns of sexual role alternations within mating pairs can be explained...

..Our results thus provide evidence that repeated inseminations function to ensure fertilization success. We discuss possible constraints on sperm production and utilization that may have contributed to this pattern...

..These results extend the functions of the spermatheca and the role of the male during the reproductive process...

..3% of the mean). Finally, overall maternal effects accounted for a significant proportion of the total phenotypic variance of calving interval (1.4 +/- 0.6%) and nonreturn rate (1.1 +/- 0.5%)...

..We experimentally manipulated the age of the sperm fertilizing kittiwake eggs by fitting males with anti-insemination rings for variable periods of time preceding egg-laying...

..The origin and function of these cells could not be determined. The specializations seen in the spermatozoa are discussed as possible adaptations related to the habit of insemination.

..The fertility traits were days to first service (DFS), days between first and last insemination (DFLI), calving interval (CI), number of services per conception (NSPC) and conception rate to first ..

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..1%). Out of 33 couples who wished to achieve pregnancy, 26 reached the stage of insemination. Four pregnancies were achieved after 33 cycles of In-Uterine-Insemination (pregnancy rate 28...

..In the simultaneous hermaphroditic M. substriata the nucleate paraspermatozoa associate with the euspermatozoa to form spherical spermatozeugmata that are stored in the testis...

..Future research will serve the dual purpose of providing more detail of the mechanisms of both heterospecific and conspecific prezygotic processes...

..Our results indicate that strategic sperm allocation under male rarity will have a greater impact on infected females and has the potential to regulate spread of parasitic feminisers in host populations...

In traumatic insemination, males pierce females with hypodermic genitalia and ejaculate into the body cavity rather than into the genital tract...

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..Unlike male Ae. aegypti that can inseminate up to seven females after their testes are removed, An. gambiae do not store sperm in the vas deferens and without testes would be unable to inseminate any females...

..15 M sodium chloride to which 0.005 M ATP was added. Insemination did not occur in starved fleas or those fed protein-free diets...

Hypodermic insemination occurs in piscicolid leeches (Hirudinea, Rhynchobdellida, Piscicolidae). The spermatophore is implanted in a specialized region of the leech body, the copulatory area...

..in beef cows, specifically, production expressed as the number of calves born alive per year (NACY), age at the insemination that resulted in the birth of the first calf (FI), and length of productive life (LPL); and 3) to investigate ..

..Also, days open and SCCS at breeding were related to ability of lactating females to maintain pregnancy, but there were no relationships between fetal loss and milk yield, lactation number, number of times inseminated, or season...

..were used to investigate 2 methods of analyzing uncertain binary responses for success or failure at first insemination. A linear mixed model that included herd, year, and month of mating as fixed effects; unrelated service sire, ..

Leucocyte changes after insemination may affect conceptus implantation, but information regarding leucocyte populations in the ruminant reproductive tract is limited...

..Forcible insemination is usually inferred from direct physical battles between the sexes and has been dismissed on intuitive grounds ..

..Except for the phototactic response of lozenge-suppressed flies, the functional ability of the compound eye can be correlated with its morphology...

..Cytokines and prostaglandins synthesized in the male accessory glands are transferred to the female at insemination, where they bind to receptors on target cells in the cervix and uterus, activating changes in gene expression ..

The egg hatchability, insemination, and longevity of Japanese Culex pipiens pallens Coquillett and Japanese Culex quinquefasciatus Say were compared at 25 and 30 degrees C. Egg hatchability was high in Cx. p...

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..Nevertheless, these results suggest that adenovirus may inadvertently integrate into the patient's germ line and indicate that there is no barrier to adenovirus infection in spermatogonial stem cells...

..that affect myometrial activity, and the possible role of uterine contractions in the process of (artificial) insemination, sperm transport and fertilization. Myometrial activity in the sow increases during estrus...

..Since semen has been shown to mediate immune modulation, we tested whether exposure to paternal Ag during insemination activated or tolerized anti-paternal CD8+ T cells...

..This study was observational in nature, and included 91 patients who were treated using split insemination techniques. The fertilization rates for the ICSI group and the IVF group were 41.1 +/- 15.0% and 53.2 +/- 19...

..Inseminated females do not reliably avoid males that disturb pregnancy unless the sire is immediately present...

..MAP kinase activity increased between 1 and 2.5 h post-insemination, at which time the second polar body was emitted and sperm chromatin was dispersed; its activity decreased ..

The effect of intravenous cloprostenol treatment at the time of insemination on reproductive performance was consecutively evaluated in three different subpopulations of high producing lactating dairy cows: Study (1) early postpartum ..

..potential for improving pregnancy rates (proportions of inseminations that result in pregnancy) to artificial insemination (AI) if the time of ovulation could be predicted with more certainty...

..the present study were to evaluate factors associated with estrous synchronization responses and pregnancy per insemination (P/AI) in Bos indicus beef cows submitted to progesterone-based fixed-time artificial insemination (FTAI) ..

This study investigated the effects of different artificial insemination (AI) regimes on the pregnancy rate in mares inseminated with either cooled or frozen-thawed semen...

..Females that were parturient following insemination excreted relatively low levels of urinary testosterone compared to non-parturient females...

Donor insemination involving family members can be complex. Although it may offer some advantages to the requesting individuals, to the donor, or to the family, related donation does raise a significant number of concerns...

Objectives were to develop a timed artificial insemination (TAI) resynchronization program to improve pregnancy per AI and to evaluate responses of circulating progesterone and pregnancy-associated glycoproteins in lactating cows...

..The three methods of artificial insemination (AI) were cervical AI with fresh-diluted or frozen-diluted semen at observed estrus, and an intrauterine AI ..

..To confirm the transmission of Toxoplasma gondii by semen and to investigate the impact of vaginal status on the transmission of T. gondii in female rabbits...

..Donor cows were slaughtered 3, 4, 5, 6, and 7 days after the second insemination and isolated reproductive organs (Fig...

..and synchronize ovulation in goats during the non-breeding season, allowing for systematic timed artificial insemination (AI), without the need for prior estrus detection. This method (IMA...

..assessed in the cheetah (Acinonyx jubatus) and clouded leopard (Neofelis nebulosa) to help optimize artificial insemination (AI). Eighteen female cheetahs were used on 29 occasions and were given i.m...

..e. pregnancy rate as well as litter size. Measures of sow development (live weight at first insemination, farrowing and weaning) and reproduction (total number of piglets born, weaning to insemination interval, ..

The fertility of ewes after artificial insemination and the relationship between fertility and motility characteristics assessed by a computerized motility analysis system were examined with ram semen frozen in diluents reported to ..

Despite its being used for a long time, intrauterine insemination (i.u.i.) remains debated as to its precise place and efficacy among assisted reproductive technologies...

..in the crypts of the utero-tubal junction (UTJ) and the oviduct of sows approximately 24 h after intrauterine insemination (IUI) and deep intrauterine insemination (DIUI) and compared with that of conventional artificial insemination (..

..The single follicle is then fertilized secondary to timed intercourse or artificial insemination, where semen is injected directly into the uterus...

..sodium cloprostenol, followed 54 to 56h later by 100 microg of gonadorelin, followed by fixed-time artificial insemination at 13 to 18h after the final GnRH injection (Ovsynch); (2) as for (1) but with placement of an intravaginal ..

..30 to 80 postpartum and (iii) if repeated OPU negatively affect fertility following a fixed-time artificial insemination protocol. After parturition suckled Angus cows (n = 30) were divided in three groups (n = 10 group(-1))...

..versus gonadotropin-releasing hormone (GnRH) on ovulatory response and pregnancy rate after timed artificial insemination (TAI) in 605 lactating dairy cows. Cows (mean+/-SEM: 2.4+/-0.08 lactations, 109.0+/-2.5 d in milk, and 2.8+/-0...

In swine artificial insemination, several dose regimens are applied, ranging from 1.5 x 10(9) to 6.0 x 10(9) spermatozoa per intra-cervical insemination dose...

..bME) during a transient co-culture of gametes for 10 min, and/or the following culture until 6-9 h after insemination, on sperm penetration of porcine in vitro maturation (IVM) oocytes and the early development in vitro...

..The semen was supplemented with prostatic fluid before insemination. In experiment 1 bitches of each breed were randomly assigned to three treatment groups, consisting of 29 ..

..estrus and, as a result (since the gilts were inseminated at a fixed estrus number), age and bodyweight at insemination. Furthermore, PRLR genotype affected total number of piglets born (TNB, P = 0...

The objective was to diagnose pregnancy within 18d after insemination by measuring interferon-tau (IFN-tau)-stimulated genes (ISG) expression in circulatory leukocytes...

..The decreased conception rates (CR) experienced with sexed semen make virgin heifers better suited for insemination with sexed semen than lactating dairy cows...

Previous research indicated that the size of the ovulatory follicle at the time of insemination significantly influenced pregnancy rates and embryonic/fetal mortality after fixed-timed AI in postpartum cows, but no effect on pregnancy ..

..The proportion of transferable female embryos produced approximately doubled when insemination was with X-sorted spermatozoa compared to insemination with unsorted semen (heifers 96.4% versus 41.1%; cows 81...

Objectives were to investigate 2 intervals from induction of ovulation to artificial insemination (AI) and the effect of supplemental progesterone for resynchronization on fertility of lactating dairy cows subjected to a 5-d timed AI ..

..if a GnRH analogue, buserelin, could be used for ovulation induction in rabbit does submitted to artificial insemination (AI) by intravaginal administration, by adding the hormone to the seminal dose...

Although cryopreservation of boar semen for artificial insemination (AI) was developed 35 years ago, cryopreservation conditions and AI strategies are still considered sub-optimal...

..designed to evaluate the cost-effectiveness of two different protocols of stimulation in intrauterine insemination (IUI) cycles...

..lymphocyte subpopulations and MHC class II expressing cells in the sow endometrium following post-ovulatory insemination in relation to clinical findings and pregnancy outcome...

..PGF2 alpha (Estrumate, 500 micrograms) was given 48 h after the superstimulatory treatment and artificial insemination was done 60 and 72 h later...

..Timed artificial insemination (TAI) was performed 16 to 20 h after the second GnRH in both treatment groups...

Two experiments evaluated the influence of follicular wave at artificial insemination (AI) on fertility of dairy cows...

..determine relationships among factors influencing responses to the first GnRH injection in a timed artificial insemination (TAI) protocol and subsequent fertility after altering timing of the second GnRH injection and AI relative to ..

..Problems with missing estrous signs and decrease in conception rate by artificial insemination (AI) performed at wrong timing have caused low AI conception rates...

..objective of this study was to evaluate the factors that may affect conception rates (CR) following artificial insemination (AI) or embryo transfer (ET) in lactating Holstein cows. Estrous cycling cows producing 33.1 +/- 7...

..either the spermatozoa or the embryos in the reproductive tracts of sows after unilateral, deep, intra uterine insemination (DIUI)...

..for both repeated measures within cow and clustering at the herd level, non-pregnant cows after first insemination tended to have increased circulating BHBA concentrations from 3 wk before calving to 9 wk after calving ..

..2 mg of FM i.m./kg of body weight twice on d 14/15 and 15/16 after insemination, whereas heifers in the control group (n=194) remained untreated...

..Artificial insemination was performed at predetermined fixed times [54 h (FTAI 54; n = 424) or 66 h (FTAI 66; n = 427) after PGF(2alpha)..

To assess the results of intrauterine insemination (IUI) in the Netherlands.

..2, koalas on day 2 of oestrus were exposed to one of the following treatments (n=9 per group): artificial insemination with 1 ml 0...

..PGF2alpha) doses at 10-day intervals or more did not result in acceptable pregnancy rates in timed artificial insemination (TAI) programmes in ewes...

..semen, collected from 25 White Italian ganders by dorso-abdominal massage was used immediately for artificial insemination of 10 geese (the control group) with a dose of 80 microl...

..To investigate the incidence of and clinical factors influencing neonatal birth defects from different assisted reproductive technology...

The objective of this study was to compare the economic benefits of timed artificial insemination (AI) and a progesterone insert as therapeutic treatments for cows diagnosed with cystic ovarian disease (COD)...

Supplementation of semen extender with caffeine and CaCl(2) for artificial insemination (AI) of fresh spermatozoa has been demonstrated to reduce recruitment of uterine polymorphonuclear leukocytes (PMNs) and the activity of phagocytosis...

A new procedure for non-surgical deep intrauterine insemination (DUI) in unrestrained sows hormonally induced to ovulate, has been reported...

..efficient macaque sperm cryopreservation and will aid in successful propagation of germplasm through artificial insemination and in vitro fertilization programs...

..The efficacy of relaxin in improving pregnancy rate when added to insemination media for intrauterine insemination will be determined...

..research detailed in this application may allow the clinician to modify in vitro fertilization and artificial insemination methodologies to enhance capacitation...

..research detailed in this application may allow the clinician to modify in vitro fertilization and artificial insemination methodologies to enhance capacitation...

..research detailed in this application may allow the clinician to modify in vitro fertilization and artificial insemination methodologies to enhance capacitation...

..research detailed in this application may allow the clinician to modify in vitro fertilization and artificial insemination methodologies to enhance capacitation...

..of surgical treatment versus observation to achieve a spontaneous pregnancy or with the aid of intrauterine insemination. It is proposed that varicocele surgery will clearly benefit couples with infertility when the male partner has ..

..Females, in turn, are dependent on male insemination for their own reproduction, and in addition require mammalian blood to develop eggs...

..the first two clinical trials were completed and the initial analysis of the superovulation/intrauterine insemination (SO/IUI) protocol was published in the New England Journal of Medicine...

..ion channel isofomis, with poor sperm-fertilization-potential biomarkers and low fertility by IVF, artificial insemination and coitus...

..efficient macaque sperm cryopreservation and will aid in successful propagation of germplasm through artificial insemination and in vitro fertilization programs...

..With donor insemination, the child is genetically related to the mother but not the father, and with egg donation it is the mother with ..

..With donor insemination, the child is genetically related to the mother but not the father, and with egg donation it is the mother with ..

..We tested this hypothesis in our intrauterine insemination patients and found that CPK activities predict sperm fertilizing potential in fertile and infertile OS men...

..sperm function, combined with the fertility experience of the about 320 infertile couples in our intrauterine insemination program, will give us clear indication as to which of the parameters may be predictive to fertility/infertility...

..The central hypothesis is that in infertile women undergoing ovarian stimulation and intrauterine insemination, the use of aromatase inhibitors will stimulate the ovaries sufficiently to produce no reduction in the rate of ..