@article{MAKHILLJAVA20171614526,
    title = {Estradiol Concentration and Estrous Behaviour in Tropical Heifers
Supplemented with Undegradable Protein},
    journal = {Journal of Animal and Veterinary Advances},
    volume = {16},
    number = {1},
    pages = {24-31},
    year = {2017},
    issn = {1680-5593},
    doi = {javaa.2017.24.31},
    url = {https://makhillpublications.co/view-article.php?issn=1680-5593&doi=javaa.2017.24.31},
    author = {Novia Dimar,Ismaya,Budi Prasetyo,Sigit and},
    keywords = {Estradiol,estrous,heifers,tropical,rumen undegradable protein},
    abstract = {This research was aimed to examine the effect of Rumen Undegradable Protein (RUP) supplementation
on estradiol profile and estrous behaviour in heifers maintained in tropical climate. A total of 36 Brahman Cross
(BX) beef heifers were divided into 2 groups, control group (ration without supplemented RUP) and treatment
group (ration with supplemented RUP). The heifers were inseminated on third days after ovaries checking with
USG and synchronized with PGF<sub>2&alpha;</sub> . Blood sampling was conducted to measure the estradiol concentration in 5 points: during the estrous (0); 5; 17; 19 and 21 days. Estrous behaviour were recorded 4 times a day. Results
showed no significant effect (p&gt;0.05) of feeding RUP between control and treatment group to estradiol
concentration (130.96&plusmn;40.96; 134.75&plusmn;39.00; 137.31&plusmn;47.24; 133.48&plusmn;36.90; 143.89&plusmn;55.83 pg mL<sup>-1</sup> vs. 126.59&plusmn;34.86;
124.93&plusmn;38.82; 123.20&plusmn;42.39; 126.11&plusmn;46.45; 126.25&plusmn;32.66 pg mL<sup>-1</sup>) and estrous behaviour but there was a
significant correlation (p&lt;0.01) between estradiol concentration to estrous behaviour. In conclusion, the level
of estradiol concentration and estrous behaviour in heifers were not effected by undegradable protein
supplementation.}
    }