Gestational Diabetes Rising in U.S. Women

This March 25th Reuters Health article (BugMeNot) contributes the rise in number of gestational diabetes mellitus (GDM) to the obesity epidemic which absolutely makes no sense for us as my wife is in no way obese. Regardless of the cause the trend is on the rise.

"The prevalence of GDM has been increasing over the past 8 years" -- by about 12% per year, Dr. Dabelea told Reuters Health

An interesting warning can be derived from the article also. The study shows our daughters could be at a greater risk.

"Moreover, women born more recently were at increased risk for GDM compared with women born earlier, probably reflecting an increased exposure to risk factors operating before childbearing years, such as obesity,"

Again, the mention of obesity but they are guessing. Could other factors be causing an increase in GDM in younger women?