Why are pregnant women advised not to smoke and take narcotic dyrugs ?

Why are adolescents especially advised not to smoke ? How does smoking affect the functioning of the body ?

Why are adolescents especially advised not to smoke ? How does smoking affect the functioning of the body ?

Why are we advised to take sufficient water ?

Pregnant women are vaccinated for tetanus. Give reason.

Why we advised to take sufficient water?

Why are pregnant women recommended substantial intake of green leafy vegetables in their diet, especially in the 1st trimester?

Pregnant ladies are advised to eat leafy vegetables and take folic acid pills. Why?