Quoting JiLLiAN.:" you also aren't supposed to gain 80 pounds like a ton of women do. so yeah, i'd say 3 months is reasonable as well."
No 3 months is not reasonable at all( I'm sure a doctor would agree that 3 months is ridiculous! ). A lot of women still have swelling and don't even have a normal cycle yet by 3 months, their body is still trying to get back to "normal". It seemed like forever for my friends face swelling to go away, and she is little, and I remember her posting on FB at 7/8 months PP that she's FINALLY able to button her jeans and they not be so tight to where she can barely breathe. Not everyone puts on 80 lbs. Some put on a lot less and still can not button their jeans at 3 months PP. Every body's BODY is different. I am 4months PP and gained nearly 30 lbs in my pregnacy, and I still can't button my jeans and am still wearing my maternity shirts