Overview of the sows and piglets used.

Sows 1 to 6 were from the first batch, sows 7 to 12 were from the second batch. All animals were (Terra × Finnish landrace) × Duroc mix. ALLO sows were treated with 15 mg allopurinol per kg body weight, once daily. *No LBW piglets were born in these litters, and consequently, no LBW piglets could be selected for the open field test and the holeboard test. 1Number of piglets for placental measures; 2Number of piglets for blood gas measures.编号1至6的母猪来自第一批次，编号7至12的母猪来自第二批次。所有试验动物均为（Terra × 芬兰长白猪（Finnish Landrace））× 杜洛克猪（Duroc）的杂交组合。对ALLO组母猪每日一次按每千克体重15mg的剂量给予别嘌呤醇（allopurinol）。 *本次所有分娩窝次均未产下低出生体重（Low Birth Weight, LBW）仔猪，因此无法选取低出生体重仔猪进行旷场试验（open field test）与洞板试验（holeboard test）。 1. 用于胎盘检测的仔猪数量； 2. 用于血气检测的仔猪数量。