15 EFFECT OF SEMEN THAW METHOD ON CONCEPTION RATE IN DAIRY HEIFER HERDS
نویسندگان
چکیده
منابع مشابه
: the effect of sericin levels (silk glue protein) on rate of in vitro maturation, fertilization and culture of sheep oocytes
هدف از آزمایش اول بررسی اثر سطوح مختلف سریسین [0 (control), 0.1, 0.5, 1.0, 2.5 %] افزوده شده به محیط , ivm بر cumulus cell expansion، بلوغ هسته و توسعه متوالی جنین، در گوسفندان نژاد سنجابی در فصل تولید مثلی می باشد. از سرگیری میوز به وسیله خارج شدن اولین پولار بادی اندازه گیری و هم چنین درصد رسیدن جنین های دو سلولی به مرحله کلیواژ و بلاستوسیت نیز به عنوان نشانه ای از میزان شایستگی توسعه اولیه ج...
Evaluations for service-sire conception rate for heifer and cow inseminations with conventional and sexed semen.
Service-sire conception rate (SCR), a phenotypic fertility evaluation based on conventional (nonsexed) inseminations from parities 1 through 5, was implemented for the United States in August 2008. The SCR model contains the categorical fixed effects of parity for lactations 1 to 5; state-year-month of insemination group; 6 standardized milk yield groups; service number for inseminations 1 to 7...
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Delayed conception is defined as an interval of greater than 90 days postpartum before a cow becomes pregnant again. In this study, the risk factors for delayed conception in Korean dairy herds were determined by evaluating several reproductive factors in individual cows. The following data was recorded from 1,012 pregnancies in eight dairy herds (designated A-H) from July 2001 to June 2006: he...
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Experiment I was designed to test the effect of thaw rate on semen packaged in glass ampules. One ejaculate from each of 10 Holstein bulls was diluted in egg yolk-citrate-glycerol, packaged in 1.0 ml glass ampules and frozen in liquid nitrogen vapor. Water bath thaws of 5 C for 10 rain, 20 C for 4 rain, 35 C f o r 4 min, 50 C for 75 sec, 65 C f o r 4 8 sec, 80 C for 37 sec and 100 C for 20 sec ...
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ژورنال
عنوان ژورنال: Reproduction, Fertility and Development
سال: 2005
ISSN: 1031-3613
DOI: 10.1071/rdv17n2ab15