I personally don't believe in a "healthy" weight gain range. I do however, believe in having a healthy pregnancy by watching what you eat. My family Doc says not to go over 25lbs and my OB is happy with just about anything as long as you and baby are healthy. I gained 68lbs with ds but a lot of that was in the last 4 weeks due to water retention. So far with this one at 36 wks, I have gained 31-32lbs and don't feel nearly as bloated or swollen. I still am very swollen but not like with my first.
If you want the text book of a healthy weight gain it something like this:
I was under weight and my dr wanted me to gain between 25 and 30, I am 24 weeks and have dained 9 pounds, she said that would be fine even if I didn't make it to 20 pounds the baby is really healthy> Good luck
My midwife said that a common, and healthy gain, is a pound per week...so 40 total. I thought that was high and she said, despite what books tell you and even what doctor's recommend, this amount is the most common amount gained in most healthy pregnancies.
My ob/gyn says 25-35 lbs. depending on your weight. With my daughter I gained 55lbs. Now mind you, I'm only 5 feet tall and I started out weighing 105. Alot of that weight gain was due to water retention as well plus I had pih. I'm hoping to gain no more than 30 w/ this pregnancy.