Pascoe R R
Equine Vet J. 1983 Jan;15(1):40-2. doi: 10.1111/j.2042-3306.1983.tb01698.x.
Within a group of 130 mares which, in the event, carried twin pregnancies, 29 (22.3 per cent) produced their twins following diagnosis of a single palpable follicle at service and a single pregnancy 42 days later. The whole group of 130 twin-pregnant mares gave birth to only 17 live foals (13 per cent). Breeding results for the following season were available for 102 of these mares, when 38 (37 per cent) produced live foals. Thus over the two seasons an average 23 per cent of this group produced live foals. In a second group, comprising 70 mares, twin pregnancy had been diagnosed in all of them by rectal palpation. Five methods of treatment were then applied to five subgroups of mares and 20 (28 per cent) of the 70 mares produced live foals that season. Breeding results for the following season were available for 53 of these mares; 33 (61 per cent) then produced live foals. Thus over the two seasons an average 46 per cent of the treated group produced live foals. The administration of a prostaglandin analogue at less than 35 days of gestation was outstandingly successful as a method of treatment.
在一组130匹怀有双胎妊娠的母马中，有29匹（22.3%）在配种时诊断出有一个可触及的卵泡，42天后诊断为单胎妊娠，随后产下了双胞胎。这130匹怀有双胎的母马总共只产下了17匹活驹（13%）。其中102匹母马有下一季的繁殖结果，当时有38匹（37%）产下了活驹。因此，在这两个季节里，该组平均有23%的母马产下了活驹。在第二组由70匹母马组成的群体中，通过直肠触诊诊断出所有母马都怀有双胎。然后对五个母马亚组采用了五种治疗方法，该70匹母马中有20匹（28%）在那个季节产下了活驹。其中53匹母马有下一季的繁殖结果；那时有33匹（61%）产下了活驹。因此，在这两个季节里，治疗组平均有46%的母马产下了活驹。在妊娠不到35天时给予前列腺素类似物作为一种治疗方法非常成功。
