2 under 2

Random question.

For those of you who have 2 very close in Age.

Were you Full term with the 1st (39/40w)?

And was baby #2 earlier ? Not due to health reasons, just naturally came earlier?

I have a friend with 3, the 1st 2 are close together and #1 was actually late, #2 came 2 weeks earlier her 3rd was a week late also.

Just wondering if there is any correlation with having an active toddler and birthing early.