Answer:
Tobacco. Smoking during pregnancy increases the risk of health problems for developing babies, including preterm birth, low birth weight, and birth defects of the mouth and lip. Nicotine is a health danger for pregnant women and developing babies and can damage a developing baby's brain and lungs. This could really harm the baby.
For green tea (antioxidants) antioxidants stabilize the effects of free radicals. Prescription medicines may deplete nutrients.
When implementing a personal plan if you believe you will struggle on it take it step by step or slowly to prevent yourself from doing more then you can