Anorexic pregnant women?

Feministing reported on pregnant women who try to slim down back in September as a disturbing New York City trend, but it seems that the rest of the country is (unfortunately) catching on.
A Johns Hopkins study found that one in five pregnant women think it’s cool to skip meals, and that most feel bad about their weight gain. Umm, you have another friggin person in there—you’re going to gain weight!
Coauthor of the study, Dr. Laura Caulfield, noted that this was the case “even among women who gained the recommended amount of weight associated with a healthy pregnancy.” Ugh.
What’s the deal ladies?