I have 5 TB racing brood mares. 

During their pregnancy I give them one dose of NitrOxide every other day. 

The Vets comment about the mares, what great condition they are in and how fast they come back. 

They also comment about the foals, that they are extremely healthy and have great leg bones. 

If you would like to see how important Nitric Oxide is for pregnant horses, you can review the world wide research by going to Google and typing in: Nitric Oxide + fertility.