Kids should be the ones telling moms to eat their veggies.

A new study shows that moms-to-be who consume green vegetables during the first trimester help prevent asthma in their offspring.

Broccoli, spinach, cabbage, sprouts and kale consumption during early pregnancy may have a protective effect against asthma in offspring at 2 years of age, according to researchers at the National Research Institute for Child Health and Development in Tokyo.

The children of moms who tracked their food intake during pregnancy were checked for signs of asthma at age 2. Those children whose moms consumed cruciferous and folate-rich veggies were 52 percent less likely to wheeze than those whose moms consumed less of the healthy stuff.

It’s news moms-to-be should use, considering that asthma has been on the rise in the US, with about one in 12 suffering from it in 2009, up from one in 14 in 2001.