Which statement regarding alcohol consumption during pregnancy is incorrect?

The statement concerning dieting to lose weight during pregnancy is incorrect because the general medical consensus advises against intentional weight loss through dieting during pregnancy. Instead, the focus should be on achieving a healthy weight gain that is appropriate for the individual's starting weight before pregnancy. This means that while managing weight gain is important, it should be done through balanced nutrition and physical activity rather than outright dieting, which can deprive both the mother and the developing fetus of essential nutrients.

On the other hand, the other statements highlight important aspects of pregnancy health. The assertion regarding alcohol consumption reflects the significant risks associated with prenatal alcohol exposure, underlining the importance of avoiding alcohol entirely during pregnancy. The mention of weight gain challenges later in pregnancy emphasizes the need for early nutritional management. Lastly, the statement about sexual intercourse being safe, barring specific complications, aligns with general recommendations for a healthy pregnancy, allowing for physical intimacy unless contraindicated by medical advice.