Well, there are only 4 weeks in february so 4 weeks does not equal 1 month. If 40 weeks equals 10 months and there are 52 weeks in a year, where is this mystery 13th month?
My last period was in january and i'm due in october. January to october is 9 months. I'm 35 and a half weeks now and i'm 8 months, just entering my 9th (but 8 complete months).
I just don't get why it's so confusing for some. Just look at a calendar.
And I mean no offense by this post. Like I said, it's just one of my biggest peeves.