Canine Pregnancy Test
test above (two pink lines) is manufactured by Synbiotics
Corporation in San Diego, CA.
It is called Witness(R) Relaxin, the first rapid, early
canine pregnancy detection test for use by veterinarians in their
I have been asking my vet for sometime now about a canine
pregnancy test. They finally got one in, so I thought I would put
some information on this page for others who are interested. I
understand that if one sees two dogs in a tie, the chances of a
litter are pretty good :-) In my opinion, it is still a nice
and inexpensive thing to supply puppy buyers with and can provide
breeders with valuable information*. Buyers have sent in their
deposit, gotten their hopes up, and may be wanting to make
arrangements but may be wondering "What if she isn't
bred?" - This is an early and reliable way to answer that
- When can the test be done?
Soon after implantation, 22-27 days after mating.
- How much does the test cost?
The test and office visit cost me $40.00 (or you can order a 5
test kit for $99.95)
- How do they perform the test?
By withdrawing a small about of blood.
- How long does the test take?
Test results are available in 10 minutes or less.
- How does the test work?
This test for determining canine pregnancy status measures the
hormone relaxin, which increases dramatically after a
fertilized egg implants in the uterine wall. Relaxin is
secreted primarily by the placenta and is the only hormone
specifically associated with canine pregnancy. Hormone levels
remain elevated throughout gestation and decline quickly
following whelping or abortion.
- *Why use the test?
This test can be used in detection of 'false' pregnancy (relaxin
hormone is absent in pseudopregnant bitches),
diagnosing fetal death and resorption, or spontaneous
It is also less invasive (shaving, etc) than an ultrasound
IMO, and ultrasounds can be misinterpreted.
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