نتایج جستجو برای: reproductive techniques

تعداد نتایج: 719808  

Journal: :Fertility and sterility 2012
Judy E Stern Timothy N Hickman Donna Kinzer Alan S Penzias G David Ball William E Gibbons

OBJECTIVE To assess whether total reproductive potential (TRP), the chance of a live birth from each fresh cycle (fresh cycle plus frozen transfers), could be calculated from the national Society for Assisted Reproductive Technology Clinic Outcome Reporting System (SART CORS) database and whether information not available in SART CORS resulted in significant changes to the TRP calculation. DE...

Journal: :Bulletin of mathematical biology 2003
Daniel Coombs Michael A Gilchrist Jerome Percus Alan S Perelson

Viruses reproduce by multiplying within host cells. The reproductive fitness of a virus is proportional to the number of offspring it can produce during the lifetime of the cell it infects. If viral production rates are independent of cell death rate, then one expects natural selection will favor viruses that maximize their production rates. However, if increases in the viral production rate le...

Journal: :Human reproduction 1998
A Kamischke E Nieschlag

The field of reproductive medicine is characterized by the rapid development of assisted fertilization. Today, fertilization can be achieved by cytoplasmic microinjection of single spermatozoa or spermatids into oocyte cytoplasm. In view of these new reproductive techniques, conventional diagnosis and treatment of male infertility seem to be rather outdated and limited. However, the final goal ...

Journal: :Genetics 1966
K Sittmann H Abplanalp R A Fraser

usefulness of Japanese quail (Coturnix coturnix japonica) as an expenT z n t a l animal was first pointed out about eight years ago (WILSON, ABBOTT and ABPLANALP 1959, 1961; PADGETT and IVEY 1959). These birds have steadily gained in popularity since then, but few quantitative genetic studies have been reported to date. The present investigation was designed to assess the response of Japanese q...

Journal: :Journal of clinical and diagnostic research : JCDR 2013
Nidhi Sharma Rohini Upasana

An interstitial ectopic pregnancy is a rare and a dangerous form of an ectopic pregnancy. It presents late clinically and it is difficult to be imaged radiographically. We are presenting a case of an interstitial pregnancy which was a surprise intra operative finding.As Assisted Reproductive Technology (ART) procedures are becoming popular, the incidence of ectopic pregnancies is likely to incr...

2017
Ruairidh D. Campbell Frank Rosell Chris Newman David W. Macdonald

Using 15 years of data from a stable population of wild Eurasian beavers (Castor fiber), we examine how annual and lifetime access to food resources affect individual age-related changes in reproduction and somatic condition. We found an age-related decline in annual maternal reproductive output, after a peak at age 5-6. Rainfall, an established negative proxy of annual resource availability fo...

Journal: :The Journal of general virology 2006
T Stadejek M B Oleksiewicz D Potapchuk K Podgórska

Porcine reproductive and respiratory syndrome virus (PRRSV) ORF5 and ORF7 sequences from Belarus were found to be of the European (EU) genotype, but grouped separately from all other EU genotype sequences described so far, including live-attenuated EU genotype PRRSV vaccines and Italian EU genotype sequences, some of which have been associated with reduced vaccine efficacy. Also, the Belarusian...

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