I'M ALMOST 7 MONTHS! The Pregnancy Survival Guide for First-Time Dads - Primer. This site does a great job of discussing it from a man's pov while staying classy and sophisticated. The article is totally worth reading.
A greytone chart with first trimester, second trimester, and third trimester of pregnancy broken down into months and weeks. Coordinates with the fruit and vegetable baby size comparison chart in grey/gray.