Interesting....
I can understand about the shorter gaps... but am wondering about the longer gaps.
As I'm pretty sure that baby #2 for me is going to come after a very long gap...
Maybe it has to do with maternal age as well? As the women in the study were 5 years+ younger when they had their first baby... which is why the adverse effects increased for the later babies?
Although hopefully my #2 will be born whilst I am still under 30, and wont be at too much increased risk of any complications...