Final answer:
Pregnancy responsibilities crucially involve avoiding alcohol and drugs, which harm the developing fetus, rather than exercising excessively. A healthy diet and necessary nutrients are mandatory for fetal development.
Step-by-step explanation:
The responsibilities of a pregnant woman include a variety of health measures to ensure the safety and well-being of the developing fetus. These responsibilities do not include exercising excessively, which can be potentially harmful to both the mother and the fetus.
Rather, a pregnant woman should focus on eating a healthy diet that is rich in nutrients such as folic acid, calcium, iron, and omega-3 fatty acids.
Eliminating harmful substances such as alcohol and drugs is critical, as they can cause damage to the developing fetus, particularly during the critical organ-forming period in the first eight weeks post-fertilization.