Huang Y T, Johnson R K, Eckardt G R
Dept. of Anim. Sci., University of Nebraska, Lincoln 68583-0908.
J Anim Sci. 1987 Nov;65(5):1298-305. doi: 10.2527/jas1987.6551298x.
Eighty crossbred gilts were assigned randomly to treatments: 1) removal of an ovary and ipsilateral uterine horn (UHO) at 130 d of age and removal of the remaining ovary and uterine horn 12 d post-puberty; 2) UHO at 130 d of age, mated and reproductive tracts recovered when slaughtered at 30 d of gestation; 3) UHO 12 d post-puberty, mated and slaughtered at 30 d of gestation and 4) unoperated controls that were mated and slaughtered at 30 d of gestation. Age of puberty was not affected by treatments. Gilts in treatment 1 had a mean ovulation rate at the pubertal estrus comparable to gilts in treatment 3. But, gilts in treatments 2 and 3 had 16% fewer (P less than .01) corpora lutea at 30 d of gestation than control gilts. Length and weight of the remaining uterine horn at 12 d post-puberty for gilts treated at 130 d of age were similar to the averages of gilts left intact. Gilts with one uterine horn had 2.2 fewer live embryos at 30 d of gestation than control gilts (P less than .01). But, the proportion of corpora lutea represented by live embryos did not differ significantly among treatments. Gilts with one uterine horn had 1.1 fewer live embryos (P less than .15) after adjustment for number of corpora lutea, less uterine space occupied by each embryo (P less than .01) and less total placental membrane per embryo (P less than .05) than control gilts.(ABSTRACT TRUNCATED AT 250 WORDS)
80头杂交后备母猪被随机分配到不同处理组：1）130日龄时切除一侧卵巢和同侧子宫角（UHO），在初情期后12天切除另一侧卵巢和子宫角；2）130日龄时进行UHO，配种后在妊娠30天时屠宰并回收生殖道；3）初情期后12天进行UHO，配种后在妊娠30天时屠宰；4）未手术的对照组，配种后在妊娠30天时屠宰。初情期不受处理影响。处理1组的后备母猪在初情期发情时的平均排卵率与处理3组的后备母猪相当。但是，处理2组和3组的后备母猪在妊娠30天时的黄体数量比对照后备母猪少16%（P小于0.01）。130日龄接受处理的后备母猪在初情期后12天剩余子宫角的长度和重量与未处理的后备母猪平均水平相似。单子宫角的后备母猪在妊娠30天时的活胚胎数量比对照后备母猪少2.2个（P小于0.01）。但是，各处理组中活胚胎占黄体的比例没有显著差异。调整黄体数量后，单子宫角的后备母猪的活胚胎数量比对照后备母猪少1.1个（P小于0.15），每个胚胎占据子宫空间更小（P小于0.01），每个胚胎的胎盘膜总面积更小（P小于0.05）。（摘要截短至250字）
