This paper presents our results about the relationship between vaginal mucus electrical resistance values at the time of insemination and achieved cow’s pregnancy rate. We examined total of 130 cows, divided into three groups, based on the values of vaginal mucus electrical resistance (less than 179, from 180 to 320 and more than 321 units). Our three groups of cows achieved pregnancy rates of 87,5%, 73,6% and 75%, respectively. Pregnancy rate for all examined cows was 74,6%. The obtained results in this study showed that there was no statistically significant difference in pregnancy rate among analyzed groups.