I am pregnant and due when ds is 3 and a half. I have had comments to the effect that a closer age gap would be more natural, because if you are not using contraception you would become pregnant earlier.
I wasn't using contraception, but I was breastfeeding and my periods didn't return until ds was 2. Then I had a miscarraige and now I'm pregnant again. So ds1 will be nearly 3 and a half when the next is born.
I'd like to be able to point to something historical or anthropological as evidence that it is perfectly natural to have this age gap....maybe it's persuade myself...