For those who gained weight during IVF

For those that gained weight from doing IVF cycles, how did you manage weight gain during the pregnancy? I worked hard to lose weight before pregnancy and then ended up gaining 20 lbs during these cycles. Now I am about to have my FET and worried I’ll gain too much during pregnancy. Just don’t have the time left to lose it and I am about 30 lbs overweight now. How did you guys eat during pregnancy? Is it okay since you are overweight to just eat healthy and not eat a large amount in order to not gain much? I read that if you are overweight you don’t need to gain as much pregnant because the baby will take from your fat stores.