i am trying to think but i think the few that we have had came a little early. i could ask someone who has had quite a few but i won't see them for a while. i think they tend to run early.
All 5 of ours this year came early. When I say early I only mean a couple of days. All were small jackrabbit babies that look super now(one month old) I have always been impressed with the growth of our Who babies.