[MyFairLacy]

Originally Posted by Woogie Man

I've read that once a female reaches about 3 years and hasn't been bred that the uterine tissues start to toughen up and lose some of their elasticity. This could create problems if she were to become pregnant. If I'm wrong on this one, maybe someone will correct me on this.

I'm not sure about that but at about three years of age the pelvic symphysis calcifies. It basically sets the bones at this point. So if the dog hasn't already given birth before then, the birth canal may stay small and not widen as well during birth making the risk greater for a c-section