Table 1 P values for the effects of age of the ewe, farmer, ram and straw type/thawing temperature. P values and chi-square (25-days NR- and lambing rates) for the effects of age of the ewe, farmer, ram and straw type/thawing temperature in 719 ewes, aged between six months and six-and-a-half years, inseminated vaginally with 200 × 106 frozen-thawed spermatozoa using different packages and thawing temperatures, collected from 7 mature rams.