Only you can answer that. You will get a different answer for every responder on here.
First, why do you want to delay the vaccine? I am not sure why you want to do it, so I can't even speak to your question.
We do selective and delayed vaccinations so almost none of the recommended vaccinations are done on time in our house.
You need to decide, on your own, after good research, what vaccinations you feel you want for your children and which ones you don't. And then make a schedule for those.
Check out Dr. Sears and his insights on vaccinations. I like him because he is very middle of the road. Not really pro, not really con, but pretty much down the middle. He offers alternative schedules to the traditional ones. Here's a link.
Don't let either side scare you. This is a very passionate topic and you will probably get those that tell you your child will die if you don't get every shot on time and you will get those telling you that your child will die if you do get any shots anytime ever. So, take them all with a grain of salt and come to your own conclusions.
http://www.askdrsears.com/thevaccinebook/labels/alternati...