Dr. Edward Archer certainly thinks so, an his argument is compelling. "The best solution to the obesity epidemic is to encourage would-be mothers to increase their levels of physical activity so that they can prepare their metabolism for pregnancy and have leaner, healthier children." Archer, National Post July 2015. He summarizes his theory in the full article and you can read his original paper here.
An interesting extension of our 2015 theme, "It's never too early to be an active role model". Stay tuned for our 2016 theme.