My mom can't remember. She had me when she was 15 (yikes, I know) I broke that cycle when I had my first at 36 :)
She said that back then she was not awake while she gave birth. She has no memorey of the event. Strange, I can't imagine. She does remember that she had both my sister and I around the due date. I was 7 pounds and my sister was 9.5 pounds.
My first, I went two days past my due date. Super easy birth. Got to hospital at 10am had baby by 11:00am. No drugs, no inducing, just ready to go :) Baby was 6 pounds
Second, they were afraid I would have a home birth so they induced me right around my due date. Easy birth. Baby was 6 pounds 8 oz
Third, I went a full two weeks past my due date. Never went into labor on my own. I was induced, played the waiting game and then an easy birth. Baby was 5 ponds 12oz.
My sister has one child, very long and difficult birth. He ended up weighing about 7.5 pounds.
Sometimes I wonder if there is any ryhme or reason to the way it works :)