What it is:
Relaxin is a blood test that helps confirm pregnancy in dogs.
Why it is beneficial to breeders:
Confirms pregnancy earlier than imaging
Helps plan nutrition, care, and workload adjustments
Reduces uncertainty after breeding
Supports informed decisions for kennel management
When breeders should use it:
About 25–30 days after breeding
When pregnancy confirmation is needed
To plan whelping preparations and care
 
To summarize:
Relaxin: A blood test used to confirm pregnancy in dogs.