You're right. Butt this is just generalizing for the public I believe. It says the sixth month is a range from 22-26 months. Meaning 4 weeks in between. If you Divide 9 months by 40 weeks you get a repeating decimal of 4.44 weeks in each month so there is some extra as well. So if you are 22 weeks that means you've been pregnant for exactly 4.95 months (22/4.44) so basically 5. At 26 weeks though you would be 5.85 months pregnant (26/4.44). I think because it's annoying to calculate all of this, many sites just make a general chart. Though, you're right, not 100% accurate. Ps my teacher nerdy side TOTALLY just showed (English teacher though, not math).

I'm rp btw

well if I go by this then I'm 6 months rather then 5..hmmmm confusing because in my baby count down I have 4 months left