The dangers of tobacco use among women during pregnancy are so real that these cannot be ignored any more. Those who are looking to deliver healthy babies need to be more conscious as smoking during pregnancy can cause increased number of miscarriages, preterm births, still borns and deaths after birth.
In the United States and other industrialized countries, nearly 18% of women do regular smoking. This number is significantly low, nearly 8% in developing countries because of severe cultural constraints.
What are the Effects of Tobacco during Pregnancy?
It is suggested that tobacco exposure is related with a number of complications during pregnancy.
These can cause:
- Intrauterine growth restriction
- Placenta previa
- Placental abruption
- Premature rupture of membranes
- Sudden infant death syndrome (SIDS)
How Tobacco Exposure Causes Problem in Developing Placenta?
Listed are the ways tobacco causes complications to placenta:
- Effect of Nicotine in Tobacco: Nicotine, the natural ingredient in tobacco causes spasms in arteries including those which are responsible for supplying blood to the placenta. Arterial spasm reduces the supply of oxygen and much needed nourishment to the placenta. This can result in underweight babies.
- Effect of Carbon monoxide on Placenta: During smoking, oxygen is slowly replaced by carbon monoxide in the blood. Placenta growing inside the womb might try to compensate this oxygen loss by producing extra red blood cells. This can make the blood become thicker and cut off the supply of blood to the vital organs of the baby, thereby resulting in neonatal death.
- Long Term Effects of Tobacco on the Baby: During late stage of pregnancy, nicotine exposure can cause damage to baby’s rapidly developing nerve cells. Laboratory studies on animals have shown that even small dose of nicotine exposure during pregnancy result in poor functioning of brain, learning problem, etc. It is assumed that premature babies can suffer from learning disabilities all through their life because of usage of tobacco by their mothers.
Smoking and Pregnancy
According to Centers for Disease Control and Prevention, mothers who smoke during pregnancy have 30% more chance of giving birth to prematurely born babies. These babies can weigh on an average 200 gms less than babies born to non-smoking mothers. They are 1.4 to 3.0 times more like to die of Sudden Infant Death Syndrome (SIDS). However, if pregnant mothers stop smoking even by the end of second trimester, there is no more likely risk of giving birth to low-birthweight babies as non smoking mothers.
How can Pregnant Women Stop Smoking?
Certain factors can make it more likely for a pregnant woman to be more successful in her attempt to quit smoking than other women who smoke. These are:
- Her past attempts to quit smoking
- If she has a non-smoking partner or a husband
- Has good support and understanding from friends and family
- Understands harmful effects of smoking
- Determined to quit because of her baby
To quit smoking, make yourself mentally prepared for the challenge. Here’s how you can do:
- Commit yourself – set a specific date from which quit.
- Let your family and friends know about your decision to quit smoking so that they can encourage and cheer up as you try to reach towards your goal.
- Anticipate the challenges that you are likely to face and accordingly make plans beforehand to deal with such problems.
- Remove all tobacco products from your house.
- If possible, surround yourself with people who have been past smokers and have been successful quitting.
- Lastly, do not hesitate to take help from your doctor in case you need any.
Tobacco Use During Pregnancy: Evidence-Based Health Impacts
| Impact Area | Key Finding | Supporting Study / Source | Health Consequence |
|---|---|---|---|
| Preterm Birth Risk | Smoking increases risk of premature delivery by ~30% |
CDC – Tobacco Use and Pregnancy |
Higher NICU admissions, lifelong developmental delays |
| Low Birth Weight | Babies born to smokers weigh ~200g less on average |
U.S. Surgeon General’s Report (2004) |
Underdeveloped organs, higher mortality risk |
| SIDS (Sudden Infant Death Syndrome) | Smoking increases SIDS risk by 1.4 to 3 times |
NIH & National Institute on Drug Abuse |
Unexpected infant death, often during sleep |
| Placental Complications | Linked to placenta previa, abruption, and restricted oxygen |
Frontiers in Physiology (2020) |
Stillbirth, fetal growth restriction, hemorrhage |
| Neurological Development | Nicotine exposure disrupts fetal brain growth |
Environmental Health Perspectives (2005) |
Learning disabilities, behavioral disorders |
| Birth Outcomes in Quitting Mothers | Stopping smoking by 20–27 weeks reverses low birth weight risk |
American Journal of Public Health (2009) |
Birthweight normalizes to levels of non-smoking mothers |
| Smoking Prevalence (Global) | 18% of women in developed countries smoke; 8% in developing nations |
WHO Global Report on Women and Tobacco |
Targeted cessation programs are critical for global maternal health |
Note: Quitting smoking at any stage of pregnancy improves birth outcomes, and complete cessation by the second trimester can reverse many tobacco-related risks. Global health agencies continue to emphasize early intervention, family support, and access to cessation programs to protect maternal and infant health.
