Baby's Development - Week 13

Here's your weekly update of the size of the baby and what's happening in his/her development! This article states that the 13th week is the last week of the first trimester, but I've read many other places where it is considered to be the first week of the second trimester; I'm not sure which it officially is, but either way, we've got a growing baby!

Courtesy of http://pregnant.thebump.com/pregnancy-week-by-week/13-weeks-pregnant.aspx