ah--youth! LOL I could work out till kingdom come--and have most of my life--but then BAM! you get a disease and guess what my healthy happy young friends? HAHAHAHAHAHA!
And for some women--pregnancy can bring out latent health problems and 'baby weight' is a part of their lives no matter what they do. You are not considering hormones and metabolic changes than CAN be permanent---it is playing russian roulette. do you feel lucky?