“…Many maternal behaviors influence the risk of PTB, such as tobacco use, alcohol, and illicit drug abuse. Other factors are those related to nutritional habits, such as high intake of sugar‐sweetened drinks and modern Western diet, which increases the risk of PTB, whereas other nutritional factors are associated with a decreased risk, such as intake of fish liver oil, probiotic milk, garlic, and other leek products. Other factors related to an increased risk of PTB are inadequate maternal body mass index (obesity and underweight), unemployment, chronic stress, catastrophic event, life events, and physical inactivity.…”