FIELD: medicine.
SUBSTANCE: method of chicken embryo selection involves visual estimation of eggs, calculation of pre-incubation weight and index form with the embryos to be additionally estimated by embryonic growth rate during incubation by determining an embryo diameter after 18-19 h of incubation and a yolk sac vasculature diameter after 63-64 h of incubation; it is followed by selecting the embryos with the yolk sac vasculature diameter is min. 2 cm and a difference of the yolk sac vasculature diameter and the embryo diameter falling within the range of 1.0-1.5 cm.
EFFECT: method enables higher volume of the produced extra-embryonic fluid, increased virus titre, and may be used in manufacturing of vaccines for farm animals.
3 tbl
| Title | Year | Author | Number |
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| METHOD OF EARLY ASSESSMENT OF LAYING HENS IN BREEDING | 2012 |
|
RU2507739C1 |
| METHOD OF POULTRY EGGS INCUBATION | 2015 |
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| METHOD FOR PREDICTING HATCHABILITY AND PRESERVATION OF CHICKENS | 2017 |
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| METHOD FOR ASSESSING THE READINESS OF EMBRYOS FOR HATCHING | 2021 |
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| METHOD FOR STIMULATING EMBRYONIC AND POSTEMBRYONIC DEVELOPMENT OF POULTRY | 2021 |
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| BIRD EGG FERTILITY DETERMINING METHOD | 1999 |
|
RU2161404C1 |
| METHOD FOR EVALUATING PROCESS OF FORMATION OF VASCULAR NETWORK ON CHORIOALLANTOIC MEMBRANE OF CHICKEN EMBRYO | 2023 |
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| METHOD OF NEWCASTLE DISEASE PREVENTION | 2008 |
|
RU2403060C2 |
| GENDER, VIABILITY AND / OR DEVELOPMENTAL STAGE DETERMINATION OF AVIAN EMBRYOS IN EGG | 2013 |
|
RU2681536C2 |
| VACCINE AGAINST NEWCASTLE DISEASE | 2007 |
|
RU2347584C1 |
