Hello, all!
I had always been under the impression that the third trimester started at 28 weeks. Last night however, my Pampers Hello Baby ipad app said that the third trimester starts at 24 weeks. (!!)
Doing some googling, I found several other places that make this claim, for example:
http://www.babyzone.com/pregnancy/health_wellness/article/prenatal-care-timeline-pg2http://www.lpch.org/DiseaseHealthInfo/HealthLibrary/pregnant/pregn.html What's up?!