当人们饲养了母牛的时候,总希望它能年年生儿育女,给我们增加更多的劳动力,但是往往有些母牛配了种而不受孕,造或空怀,影响牲畜的繁殖。因此,人们很希望有一种简单的方法能在早期准确的检查出来,以便重配和进行合理的饲养管理,繁殖出健壮的牛犊来。近年来,苏联科学家们研究试用雄蛙来检查母牛是否怀孕,方法简单。配种后四、五十天的母牛就可以被准确地检查出来,一年四季都可进行。方法是:选取雄蛙一只,将吸 When people raise cows, they always hope that they can have children every year and give us more labor. However, some cows tend to be equipped with species that are not pregnant, made or empty, and affect the reproduction of livestock. Therefore, it is hoped that there will be a simple method that can be accurately checked at an early stage so as to reconfigure and conduct proper breeding management and breed a robust beef calf. In recent years, Soviet scientists have studied the use of male frogs to check if a cow is pregnant. The method is simple. Four to fifty days after mating, the cow can be accurately inspected and can be carried out throughout the year. The method is: Select a male frog, will suck