Recent studies have shown that children born less than two years after an older sibling are more likely to be born with Autism or other medical issues.
Consider this: You spend your entire youth building up fat, minerals, and vitamins in your body. When you are pregnant, your baby takes much of those stores, and after a baby, while nursing, you continue to use up what you've stored in your body in the past 15-20+ years. If you do not give your body time to recoup and begin storing up again, then when you're pregnant with baby#2, there is less for your body to use, and baby#2 doesn't get as much as baby#1.
I waited 3 years.got pregnant with baby#2 the month before my DS turned 3. I'm glad I waited because I know that my body has had time to build up stores again (this doesn't mean getting fat or being overweight, I was 134lbs when I got pregnant the second time.) 6months pregnant and not sure about their relationship yet.
at 10:45 AM on Jan. 21, 2011