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					Originally Posted by BlueBelle  There has been some discussion about waiting until the "bone plates" are complete. I have no idea what that means OR how you would know this. I image an exray. | 
 
   
There is no guess work.  Your vet can take a lateral view of the tibia and see if that growth plate has closed' this is the last growth plate to close.  
There are many valid structural and in the end overall health reasons to spay after growth plates have closed.