The aim of this study was to determine the impact of some non-genetic factors on pre-weaning and post-weaning growth in Sistani goat kids. Data of growth traits of Sistani calves were collected from the Institute of Research Domesticated Animals, Zabol University in Sistan and Baluchestan province and Iran in 2008. Traits under study were birth weight (BW), weaning weight at 90 days (WW3), weaning weight at 120 days (WW4),weight at 180 days (W6), weight at 270 days (W9), weight at 365 days(W12) and average daily gains from birth to weaning weight (BW-WW), from weaning weight to 180 days (WW-W6), from 180 to 270 days (W6-W9) and from 270 to 365 days (W9-W12). General linear model with class effects of dam weight, sex, type of birth and stage of weaning was used for analyses. The average birth weight of male kids was about 3% higher than female kids. The overall means of body weight at BW, WW3, WW4, W6, W9 and W12 were 1.915, 7.796, 9.900, 15.597, 26.253 and 34.2 kg, respectively. Birth weight averaged 2.398, 2.355, 1.858 and 1.865 kg for single males and females, twin males and females, respectively. Kids had a faster growth rate from 180 to 270 days with daily gain 118.4 (g/d) that the average daily gain in kids decreased with the age increase from 270 to 365 days. Average pre-weaning daily gain of female was also higher than male, but there was no significant difference observed in pre-weaning gain Heavy dam produced heavy kid (r=0.319), but later weight had no relation with dam weight. Male kids in comparison with female kids and single born kids in comparison with twin born kids had higher birth weight and weaning weight.

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