3.From parity 1 to parity 10, the least squares means for NSB progressively increased with increasing parity, the least squares means for PBA progressively decreased with increasing parity.

• 从第1胎到第10胎,NSB最小二乘平均值有随胎次增长而逐渐增加的趋势,PBA最小二乘平均值有随胎次增长而逐渐下降的趋势。