The studies aimed to evaluate the pregnancy rate (PR) for timed artificial insemination (TAI) after G7G-Ovsynch, modified G7G-Ovsynch (MG7G-Ovsynch) and Ovsynch protocols and to assess the accuracy of using pregnancy-associated glycoproteins (PAGs) and plasma progesterone (P4) in pregnancy diagnosis compared…
It was reasoned that technologies that increase the reproductive rate of males and females in dairy cattle would realize higher responses to selection. The authors tested this hypothesis using deterministic simulation of breeding schemes that resembled those of dairy cattle…
Crossbreeding is regarded as a faster way than using pure dairy breeds to improve the reproductive performance of dairy cows, which is pivotal to farm income. The reproductive performances of Jersey and Fleckvieh × Jersey (F × J) heifers and…
This study is part of an ongoing project on artificial insemination in ostriches. The physical output of neat semen from four ostrich males was investigated and the effect of reconstituting semen with: 1) seminal plasma of the same male (SPS);…
A total of 828 crossbred beef and dual-purpose type cows were allocated to three herds which were bred either artificially, artificially followed by natural service or by natural service only. Conception rates were 72,9; 88,2 and 94,3 % respectively. The…
The aim of this study was to evaluate the extender composition, presence or absence of seminal plasma and dilution rate of spermatozoa for the preservation of fresh semen during three days before artificial insemination (AI). The percentage of kidding was…
