The best time for taking maternity pictures is usually between 26 and 34 weeks or when you're in your third trimester. Your bump is out in full force, but you're not waddling and swollen like you are in the last few weeks of pregnancy. You also don't want to schedule your pictures too close to your due date because you never know when you'll go into labor. However, if this is your second or third pregnancy and you start to show early on, you might get away with taking photos earlier. With my fourth pregnancy, I took photos at 24 weeks and my bump was big enough that you can tell I'm pregnant, but I wasn't as swollen as I have been in other photos.