I would not be holding out ttc just so you'll fit in a bridesmaid dress. Sometimes it just takes that little bit longer to conceive.

Saying that I had 18mths from a m/c to falling pg again, which after agreeing to be a bridesmaid for my BIL and his finance - and going dress hunting (finding a style of dress that suited my figure - I was a little larger then the other bridesmaid and more styles suited her), I fell pg. The dresses came into the shop when I was about 6wks pg and I then had to tell the bride-to-be that I wouldn't fit into the dress she had paid for. Luckily she was able to swap sizes and find another bridesmaid, and she is having gown specially made for me as I'll be 8mths pg at her wedding. (I did offer to stand down as a bridesmaid). Now we just wait and see if I make it to the wedding. lol