The tests I know of are to test your FSH and your LH, but I don't think either one can tell you if the baby will be healthy or not. Some of the ladies here might know more.
Despite all the doom and gloom that the doctors may try to tell you, it isn't as bad as it seems. The odds of having a healthy child are still very much in your favour. Yes, the risk does increase with age, but not so much that you should be scared. To hear the medical profession (in general) talk about it, you would think it was practically a guarantee that your child would have problems! Not so! Someone here might have more accurate figures, but I think the odds of a healthy child are still over 80%. There is some good info in one of the other sections if you have time you could check it out.
If you have any other questions feel free to ask, I am sure someone will be able to help you.
Loving Mom to three
Loving Mom to three rambunctious