I'm in my third trimester. A C size is supposed to last to 200 lbs, and I have quite a long way before I hit that. I doubt I will before giving birth. Basically, I thought I'd have plenty of room to grow. The seams affixing to the lacy part are not strong. The lacyy part is quite unnecessary and much weaker than the core leg part of the hose, which is actually a decent thickness. I found the lace part extended too far down my  front - like well beyond the stomach on to the front of my thighs, which was slightly uncomfortable, but not as bad as the pain of non-maternity hose. The weak seams, however, cannot be excused. To spend over ten bucks and to have hose splitting when I should have another 30 lbs to go is ridiculous.  I didn't do jumping jacks or squats in these; I work a desk job. This was a bummer of a purchase.