Rule of thumb is that you can expect to lose 10% of the amount you want to lose during induction and 5% per month thereafter. However, in chapter 13 of the New Diet Revolution, Dr. Atkins states that the weight loss for a woman who wishes to lose more than 50 lbs. will range from 4 lbs. for someone with high metabolic resistance to 12 lbs. for someone with low metabolic resistance. Keep in mind that your goal weight may be lower than your ideal body weight, too. So that is probably why you didn't drop 30 lbs. in the first month.