Search results for "Insemination"
showing 10 items of 55 documents
Failures (with some successes) of assisted reproduction and gamete donation programs
2013
Although the possibilities for the treatment of infertility have been improved tremendously, not every couple will be treated successfully.Crude overall pregnancy rates of 50-65% per patient can be achieved nowadays, irrespective of the type of profertility treatment applied first.IVF only accounts for about 20% of the pregnancies achieved. Dropout is an important reason for not reaching the estimated pregnancy rate. Even after failed IVF, spontaneous pregnancies do occur. Sperm and oocyte donation (OD) offer additional chances to subfertile couples. Severity of the male factor (in sperm donation) and young donor age (in OD) are important determinants of success.Analysis of assisted reprodu…
Re-establishment of complement C6-deficient rabbit colony by cryopreserved sperm transported from abroad.
2007
Introducing rabbits as genetic materials into institutes for experimental animals from other colonies is essential for biomedical research. Currently, it is inconvenient to transport live rabbits from abroad, since they suffer from stress, are prone to accidents and must be inspected, as well as endure quarantine during the often long journey. To overcome these limitations of live animals, we transported sperm cryopreserved in liquid nitrogen. Rabbit sperm was collected from complement C6-deficient rabbits in Germany and then transported to Japan using a dry-shipper containing liquid nitrogen. After thawing the frozen semen and artificial insemination (AI), eleven live pups were born. Subse…
Sperm kinematic characterization of alpaca ( Vicugna pacos L.) during the reproductive season
2018
Semen analysis is a key factor when determining the fertility ability in males. South American camelids, and in particular the alpaca, have been studied very little when compared with other farm animals. The aim of this work was to perform the kinematic characterization of alpaca spermatozoa collected directly from the deferent duct by using CASA-Mot (Computer Assisted Semen Analysis for Motility) technology. Samples were obtained every three days throughout the reproductive season during two periods and with a break of seven days in the middle. During both periods, the quality of the sample's motility and kinematics increased over the first two days and then subsequently decreased. This pa…
Influence of follicle rupture and uterine contractions on intrauterine insemination outcome: a new predictive model.
2014
Objective To correlate the detection of follicle rupture and the number of uterine contractions per minute with the outcome of IUI and to build a predictive model for the outcome of IUI including these parameters. Design Retrospective cohort study. Setting Fertility clinic. Patient(s) We analyzed data from 610 women who underwent homologous or donor double IUI from 2005 to 2010 and whose data of uterine contractions or follicle rupture were recorded. Intervention(s) None. Main Outcome Measure(s) Live-birth rate. Result(s) Nine hundred seventy-nine IUI cycles were included. The detection of follicle rupture (odds ratio [OR], 1.98; 95% confidence interval [CI], 1.30–3.01) and the number of ut…
Studies on the laboratory mating habits of the mosquito Culex pipiens
2009
SYNOPSIS The variation in copulatory activity in three strains of Culex pipiens is investigated and the results are discussed in relation to genetic control of mosquito populations.
Status of two cryptic species, Typhlodromus exhilaratus Ragusa and Typhlodromus phialatus Athias-Henriot (Acari: Phytoseiidae): consequences for taxo…
2006
Typhlodromus phialatus and T. exhilaratus are morphologically close species. Their differentiation is based on the shape of the insemination apparatus and on idiosomal setae length. However, the setae length values are often intermediate between these two species and do not allow accurate identification. Furthermore, the handful of differences in insemination apparatus shape are also questionable as a means of differentiation. Synonymy between these species has thus been questioned. Three experiments were carried out. Idiosomal seta length measurements, molecular tests and cross experiments were conducted for three populations, identified as T. exhilaratus and T. phialatus according to the …
Body condition score and related productive responces in rabbit does.
2008
A simplified 3-point scale method for in vivo scoring body condition is proposed as an useful and rapid tool to support experimental and on-farm management of nutrition and reproduction of rabbit does. The productive responses of lactating rabbit does scored and inseminated at 11 days post partum (pp) are verified, as well as performance of non-pregnant does scored and re-inseminated at 32 days pp when non-lactating. After their first parturition, 96 New Zealand White rabbit does were checked for 126 days over three successive 42-day reproductive cycles. The body condition scoring was based on feel by hand the loin and the rump for bone protrusions and muscle fullness. The loin was evaluate…
The ‘margin of appreciation’ in echr case-law as a boundary line to legal transplants
2015
This study investigates the influence of the European Human Rights Court on State 'margin of appreciation' on the diffusion of accepted or rejected cultural and political choices through the jurisprudence of the case-law. The margin of appreciation is aninterpretative argument, a criterion, a parameter, which allows the Court to preserve rather than censure national State policies and choices on difficult issues which, involving moral and ethical questions, and which do not receive common answers in the ,European legal systems. The work considers some decisions of the Court on abortion, ovum donation, pre-implant embryo analysis and artificial procreation techniques, to find out if, in such…
Generic concept of the phytoseiids (Acari: Phytoseiidae) according to Athias-Henriot
2010
The economic importance of the Phytoseiidae motivated many scientists to work on the systematics of this family. One of them was the French acarologist Claire Athias-Henriot. In her first work, she tackled the question of supraspecific groupings within this family from an evolutionistic point of view, and suggested a system for numbering dorsal shield setae, that could be applied to both hypotrichous and holotrichous forms. She also looked for other characters, such as the ratios of the distance between the insertions of some setae on dorsal and sternal shields, the presence of macrosetae on legs, and the length/width ratio of the ventrianal shield. Following Dosse (1957; 1958) who used the…
Pedigree verification with multiple candidate parents using Pedverif software
2010
Species like sheep and beef cattle are commonly raised in large herds and often on pasture with multiple sires joining the females for unrecorded natural insemination. This leads to offspring with multiple candidate parents and therefore uncertain parentage. Twins or triplets can be from multiple sires as well. Pedigrees from such populations are often problematic and need proper verification. The Pedverif computer program is able to verify normal pedigrees as well as pedigrees with multiple candidate parents.