Pig International - November 2012 - 24
advances in pig breeding
New sow catheters allow for deeper insemination
and an immediate injection of semen using low
concentrations of spermatozoa.
By Mark Anderson,
Dr. Grant Walling and
In the pig industry there are multiple
versions of artificial insemination intrauterine insemination catheters, IUI,
generally consisting of relatively small
diameter rigid tubes, inside regular
traditional pipettes. This smaller tube
is gently pushed through the gilt's
cervix and directly into the uterus.
While there can be advantages to this
method, it has the potential of injuring
the sow by scraping or puncturing
delicate tissues in the reproductive
tract. This type of pipette also collects
a small amount of bacteria-laden matter
when it is threaded through the cervix.
This becomes an even more significant
issue with reduced concentration doses.
The cervix's primary role is to
keep bacteria and contaminants from
entering the uterus and uterine horns
(the animal's reproductive tract).
Once a foreign substance enters the
uterus, the animals are more prone to
infections, abortions, smaller litter sizes
and lesser farrowing percentages.
Deep intra-uterine insemination
Hydraulic AMG catheters have a flexible membrane that moves forward when a
technician squeezes on the semen tube, flat pack or bottle.
Another option for pig breeding is deep
intra-uterine insemination, DIUI. This
is a new procedure; one that uses a thin
flexible tubular pipette that is approximately
1.7 meters in length. The tube's extreme
length allows it to be inserted all the way to
the uteral tubal junction where its design
allows it to place small amounts of semen
in one horn. This artificial insemination
method may work in clinical trials
performed by doctors, but this technology
is not ready for mainstream use yet.
Absolute Swine Insemination Co. has
developed patented hydraulic AMG series
catheters. These catheters are designed to
combine the performance of DIUI and the
safety of traditional cervical inseminations
in both horns at the same time.
They have a flexible membrane
that moves forward when a technician
squeezes on the semen tube, flat pack or
bottle. Because the pipette's membranes
turn themselves inside out while
moving forward, the aforementioned
www.WATTAgNet.com | November/December 2012