The use of plastic cover sheaths at the time of artificial insemination improved fertility of lactating dairy cows
Pregnancy, Equipment Contamination - prevention & control, Insemination, Artificial - veterinary, Animals, Lactation, Catheters - veterinary, Insemination, Artificial - methods, Female, Insemination, Artificial - instrumentation, Plastics, Cattle - physiology, Fertility - physiology