Talk:Last Dance/@comment-7785205-20150731071443/@comment-26809120-20150731142203

How long does pregnancy last? It depends on how you count it. Most people determine their due date by counting 40 weeks from the first day of their LMP.

40 weeks adds up to about:

nine calendar months (30 or 31 days each) or 10 lunar months (28 days each) so you're both right in your own sense