Third Trimester????

apurva

When does this 3rd trimester actually starts?? According to <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a>, beginning of 26th week means 3rd trimester. But Google says 3rd trimester is from week 29th to week 40 (or till the baby is born)....

I am confused 😐🤔