[Fertilization results in superovulated ewes and goats after transmural-intrauterine insemination controlled by laparoscopy].

A comparative experiment in oestrous synchronized and superovulated ewes and does is described on which fertilization was studied following natural mating or transmural intrauterine insemination by laparoscopy. Thirty-two ewes were inseminated into each uterine horn with 50-100 microliter of fresh undiluted semen, whereas 26 ewes were mated by fertile rams. Fertilization rates of eggs recovered 5-7 days later were 93.7% (163/174) and 60.5% (78/129) respectively. Eight does were inseminated by laparoscopy while 12 does were mated by fertile bucks. Numbers of eggs fertilized of those recovered 6-7 days later were 42/47 (89.4%) in the intrauterine inseminated group and 51/60 (85%) in the naturally mated group. These results indicate that high levels of fertilization can be obtained in ewes following intrauterine insemination with fresh semen with the aid of a laparoscope and that it is possible to overcome the reduced fertilization rates after natural mating. In contrast to the ewe the intrauterine semen deposition in does did not improve the high fertilization rates obtained after natural mating.