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Effect of insemination-related factors on pregnancy rate using sexed semen in Holstein heifers
Holstein sex-sorted semen estrus sperm quality intracornual insemination fertility
2016/12/20
The objectives were to determine the effects of insemination with sexed semen at spontaneous and induced estrus, fixed-time insemination at synchronized estrus, the deposition site, estrous intensity,...
Growth performance, carcass traits and meat quality of bulls and heifers slaughtered at different ages
meat quality Growth performance
2015/6/23
Older animals were generally fatter and their carcasses contained lower proportions of high-priced meat (P <
0.01) and bones (P < 0.05). Bulls exhibited lower contents of dry matter (P < 0...
Superovulation following follicular synchronization with GnRH at random stages of the oestrous cycle in heifers
oestrous cycle GnRH superstimulation follicular puncture heifer
2015/6/9
The objective of this study was to develop a superovulatory program based on synchronization of follicular waves with GnRH which could be applied regardless of the stage of the oestrous cycle. 36 heif...
Superovulation following follicular synchronization with GnRH at random stages of the oestrous cycle in heifers: oocyte competence and in vitro embryo production
heifer oocyte GnRH oocyte competence
2015/6/8
The objective of this study was to develop a superovulatory program based on the synchronization of follicular waves with GnRH which could be applied regardless of the stage of the oestrous cycle. In ...
Microbial Flora of Normal and Abnormal Cervical Mucous Discharge Associated with Reproductive Performance of Cows and Heifers in Estrus
Discharge Cow Heifer Fertility Bacteria
2016/5/5
The aim of the present study was to describe whether abnormal cervical mucus discharge (A-CMD) or pathogens in cervical mucus discharge (CMD) have effects on reproductive performance of cows and heife...
Feeding systems costs for rearing beef heifers bred at 18 months of age
rearing heifers 18-months-old breeding feeding systems production cost
2010/8/31
Age at first breeding of heifers is related with economic efficiency of cattle production. The determination of feeding systems for rearing heifers is essential to reach high pregnancy rates. The aim ...
Feeding Behavior of Pregnant Dairy Heifers during Last Trimester under Loose Housing System
Drinking Heifer Eating Pregnant Rumination Time Budget
2016/5/3
Thirty pregnant heifers (Jersey, Holstein Friesian and Hariana) were divided into three groups (10 animals/group) according to their stage of pregnancy viz. seven-month (181-210 days) pregnancy (SMP),...
Plasma Amino Acid Status of Crossbred Heifers Fed Two Levels of Dietary Protein and its Relationship to Puberty Onset
Amino acids Protein Puberty Heifers Tyrosine Aspartate
2016/4/12
Twelve prepubertal Karan Fries heifers (15 months, 167.7 13.5 kg) were divided into two equal groups. Group 1 was fed as per NRC requirements and group 2 was fed 20% more protein than group 1 heifers....