Table 3 Comparison of fertility results using different packages and thawing temperatures. P values and chi-squared (25-days NR- and lambing rates) for the comparison of fertility results using different packages and thawing temperatures after vaginal insemination of 719 ewes, aged between six months and six-and-a-half years, with 200 × 106 frozen-thawed spermatozoa collected from 7 mature rams.