The risks of smoking during pregnancy.
The best way to protect the health of an unborn child, and to prevent them from starting smoking later in life, is for the person who's pregnant and anyone else in their family to stop smoking.
Smoking during pregnancy can increase risk of a stillbirth, miscarriage and the baby being born too early.
Smoking while pregnant also increases the risk of children developing lung diseases, learning difficulties and problems with the ears, nose and throat.
Risks of smoking during pregnancy
The table below shows the impact of smoking during pregnancy and the impact of exposure to secondhand smoke while pregnant.
| Impact | Maternal smoking | Secondhand smoking |
|---|---|---|
| Low birth weight | 2 times more likely | Average 30 to 40g lighter |
| Heart defects | 25% more likely | Increased risk |
| Stillbirth | 47% more likely | Possible increase |
| Preterm birth | 27% more likely | Possible increase |
| Miscarriage | 32% more likely | Increased risk |
| Sudden infant death | 3 times more likely | 45% more likely |
For more information, visit the NHS website.