After monitoring 262 pregnant women for factors such as fruit and vegetable intake, physical activity and smoking levels, University of Queensland researchers have concluded that "[t]here is a clear need to develop and evaluate effective pregnancy behaviour interventions to improve primary prevention in maternal and infant health."
Of the women surveyed, only 2.7% met the recommendations for vegetable intake, 9.2% met the guidelines for fruit intake and only 32.8% (about one-third of the women) received adequate levels of physical activity. Almost more surprising is the finding that approximately one-quarter of the women continued to smoke during their pregnancy.
— Australian and New Zealand Journal of Public Health 33(3): 228–33
The full text of the study can be read online.