Abstract:
For obtaining high and constant fecundity and
natality in sows, doses containing between 3 and 5 spermatozoa were used
in Romania. Our investigation was oriented to a new insemination method,
called intrauterine, which consists in depositing the seminal material in
uterus, thus reducing the number of inseminated spermatozoa. The
DeepgoldenpigTM device was used. This method was compared with the
classical artificial insemination, which involves the use of the Goldenpig®
device and depositing the seminal material at cervical level. Doses
containing 3, 2, and 1 billion spermatozoa, diluted with X – Cell gel were
packaged in 80 ml Cochette bags. The females with a weaning to estrus
interval of 2 – 11 days were inseminated twice at an interval of 12 hours.
Pregnancy was determined at 28 – 30 days since insemination, using an
ultrasound scan. The standard inseminating method produced fecundity
rates of 90.6%, 87.9%, and 60.5% per doses with 3, 2, and 1 billion
spermatozoa, while the intrauterine method obtained rates of 91.6%,
90.8%, and 59.5%. The farrowing rates were of 90.2%, 87.4%, and 59.5%
in case of classical method, and 90.9%, 90.3%, and 81.1% for intrauterine
method. Significant differences were obtained by using doses of 1 billion
spermatozoa. As a conclusion, intrauterine insemination was simple, safe,
and effective, and allowed the sperm dose to be reduced to 1 billion
spermatozoa.
