A hatchling born sping of 08 I wounld expect to go untill the fall of 2010 depending on their size and eating habits.

That 2008 winter 2009 winter and breeding in 2010 the third winter. Some ay go sooner som may go later..

There would be nothing wrong with waiting till the 2011 fall..In fact you may find that you get better and bigger clutches form older 4-5-6 year old virgin females.

I have it on first hand that a breeder is waiting till their 4th or 5th winter and getting 12-14 eggs..EVERY YEAR from them.