WHAT IS THE SECRET TO A HEALTHIER BABY? Prenatal exercise and great nutrition. A fit and healthy body is more efficient at doing everything including reproductivly. From gettting and staying pregnant until full term, to having a healthier pregnancy and baby by preventing many problems. See guidelines. Proper prental nutritiion is crucial for making a healthy baby, including a healthy diet and prenatal supplements. Elimination of stress and toxic exposure is vital to prevent birth defects and preserving fertility. See articles and research.