Smoking during your pregnancy is extremely risky for you and your baby - it increases the risk of premature birth, ectopic pregnancy, birth defects, miscarriage, stillbirth and sudden infant death syndrome (SIDS).
The sooner you quit smoking during your pregnancy, the better, so you should start to think about quitting as soon as you find out you’re pregnant.
Whilst quitting at any time during your pregnancy is beneficial, it’s far more beneficial to quit before week 15.