“A pregnant woman eats for two.”

The notion that a pregnant woman must "eat for two" is a widespread misconception, often passed down through generations. While its exact origins are unclear, this idea likely stems from a historical understanding that a developing baby relies entirely on the mother for nourishment, leading to the logical, though incorrect, conclusion that caloric intake should double. Family and friends (Review) often lovingly encourage extra servings and indulging cravings, reinforcing this belief.

However, modern science clearly busts this myth. A pregnant woman's body does require additional energy, but not nearly double the amount. In the first trimester, there is generally no significant increase in calorie needs, or only a small amount, such as 90 extra calories per day. Caloric requirements gradually increase to approximately 300-340 extra calories per day in the second trimester and around 450-500 extra calories daily in the third trimester. This equates to a few healthy snacks, not entire additional meals.

The body is remarkably efficient; studies show that during pregnancy, the digestive system can adapt to absorb more energy from the same amount of food due to hormonal changes. This physiological adjustment means a woman doesn't need to drastically increase her food intake from the outset. Overeating based on the "eating for two" myth can lead to excessive weight gain, which carries risks such as gestational diabetes, backaches, and high blood pressure for both mother and baby. The focus should be on nutrient-dense foods to support healthy growth, rather than simply consuming larger portions.