28 weeks is the start of the third trimester

This caused a major battle yesterday on another ladies post lol and you'll get a lot showing you Google charts saying wk27... but I've went by wk28 for 20yrs by 2 different ob offices with 9 kids..everyone has different opinions so if you wanna go by wk27 then so be it no issues here. I personally think 1wk shouldn't make a difference in a horrible argument over it. So wk27 wk28 eh to close to argue..but for MY peace of mind IM going by wk28 ( I dont see how the middle of the month starts a new trimester)

Yes the 26 week is the third trimester