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In-Clinic Pregnancy Test

Test applicable to: Dog and Cat
Sample: Serum and Plasma

FASTest RELAXIN is a rapid immunochromatographic assay for the detection of Relaxin in the plasma or serum of dog and cat. It is based on a simple “lateral flow” technique using two unique monoclonal antibodies. It offers a simple, reliable, inexpensive means of early pregnancy detection in the dog and cat.

Qualitative Detection Of The Pregnancy Hormone Relaxin 

Because detectable levels of Relaxin are only present in the serum or plasma of pregnant bitches and queens, FASTest RELAXIN can be used as an indicator for pregnancy and for monitoring pregnancy status if there is concern about spontaneous abortion or to exclude pseudopregnancy.

More Info


The hormone Relaxin is produced exclusively by the placenta of the pregnant bitch and queen when the fertilised egg is implanted (15 days after the LH surge). In the sera of bitches, it is first detected as early as 22 days post-mating. In the sera of queens, it is detected at the 29th day of gestation with a sensitivity of 100% and a specificity of 95.9%.

Relaxin concentration can also remain increased up to 14 days after the beginning of the foetus resorption (possibly up to 28 – 30 days post ovulation without any symptoms present) or abort (from 28 – 30 days post ovulation with clinical symptoms present). This is due to any active trophoblast leftovers and it can lead to a positive result.

Relaxin is the only known pregnancy-specific hormone present in both dogs and cats that will inform the veterinarian or breeder the presence of relaxin producing placenta tissue. This means that it is an indirect method of proving pregnancy in the female dog or cat.

You may also be interested in Canine Target Ovulation Test Kit, follow this link 

You may also be interested in FASTest LH, follow this link 

Advantages of FASTest RELAXIN

  • Store at Room Temperature – tests instantly available for use
  • Long Shelf Life – typically 18 months
  • Simple test procedure – no special ‘snapping’ required
  • Reliable clinical diagnostics
  • Larger 25 test kits available
  • Results in 10 – 30 minutes
  • Competitively priced


Cat NoDescriptionPrice
860FASTest RELAXIN x 5 Tests (Special Order)£79.00 (ex VAT)