Navigation Links
Giving up smoking averts the adverse birth outcomes associated with tobacco
Date:7/6/2011

Results from a study of over 50 000 pregnancies revealed that women who gave up smoking when their pregnancy was confirmed gave birth to babies with a similar birthweight to those born to mothers who had never smoked, Professor Nick Macklon, from the Department of Obstetrics and Gynaecology, University of Southampton, UK, told the annual conference of the European Society of Human Reproduction and Embryology today (Wednesday).

Low birthweight is the most common negative outcome of smoking during pregnancy, but foetuses exposed to maternal smoking are also at risk of premature birth and the associated problem of brain damage, as well as congenital abnormalities such as cleft lip. Mothers who smoke are encouraged to stop smoking when they become pregnant, but to date there was little evidence that giving up at this late stage could have a positive effect on birthweight.

Professor Macklon and colleagues decided to investigate this question by studying clinical, lifestyle, and socioeconomic data collected from pregnancies registered at the Southampton University Medical Centre between 2002 and 2010. They identified seven groups of women non-smokers, those who had stopped more than a year prior to conceiving, those who had stopped less than a year prior to conceiving, smokers who stopped once the pregnancy was confirmed, and those who continued to smoke up to 10 a day, between 10 and 20 a day, and more than 20 a day. They proceeded to compare smoking behaviour in the mothers with perinatal outcomes in the children.

After correcting for gestational age, maternal age, BMI and socioeconomic class, all of which are known to affect birth outcomes, the researchers found that those babies whose mothers had stopped smoking in the periconceptional period around the time of getting pregnant or as soon as the pregnancy was confirmed had a significantly higher birthweight.

"Not only was birthweight much better in this group than it was in the groups where the mothers had continued to smoke, but we also found that the babies reached the same gestational age and head circumference as those born to women who had never smoked," said Professor Macklon. "While a recent study has shown that the rate of pre-term and small-for-gestational-age births can be reduced by stopping smoking before the 15th week of pregnancy, our research goes much further. We can now give couples hard evidence that making the effort to stop smoking in the periconceptional period will be beneficial for their baby."

Although there is now overwhelming evidence that maternal smoking during pregnancy is damaging to the foetus, some mothers continue to smoke because they like the idea of giving birth to a smaller baby. "It is important that people who believe that a smaller baby means an easier birth take into account the increased risks of complicated deliveries in smokers," said Professor Macklon, "as well as the risk of disease later in life which goes with low birthweight. Smoking during pregnancy is not just bad for the mother and baby, but for the adult it will grow into."

In addition to this, smoking can also make it more difficult for a woman to get pregnant and carry a baby to term. Because of their faster ovarian ageing, women smokers have higher rates of infertility than non-smokers and will undergo an earlier than normal menopause. They are also are more likely to have miscarriages.

"In future we would like to look at the impact of stopping smoking prior to fertility treatments, as we believe that this could bring about improvements to fertility outcomes," said Professor Macklon. "But for now we hope that our research will provide additional encouragement to mothers-to-be to give up cigarettes."


'/>"/>

Contact: Hanna Hanssen
hanna@eshre.eu
32-047-335-3381
European Society of Human Reproduction and Embryology
Source:Eurekalert

Related biology news :

1. Caveman behavioral traits might kick in at Thanksgiving table before eating
2. Giving DHA supplements to breastfeeding mothers
3. Maize cell wall genes identified, giving boost to biofuel research
4. Will giving coffee to babies keep them awake as adults?
5. Study identifies genetic variants giving rise to differences in metabolism
6. Favorite Thanksgiving dish gets upscale breeding
7. Protein could offer target to reduce lung damage from smoking-caused emphysema
8. Certain parts of the brain activated in people who heard tailored health messages and quit smoking
9. Cigarette smoking increases production of mucus in patients with bronchitis
10. Vitamin E may increase or decrease the risk of pneumonia depending on smoking and exercise
11. Smoking habits are transmitted from mother to daughter and father to son
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/5/2017)... , April 5, 2017  The Allen Institute ... Allen Cell Explorer: a one-of-a-kind portal and dynamic digital ... 3D imaging data, the first application of deep learning ... human stem cell lines and a growing suite of ... platform for these and future publicly available resources created ...
(Date:4/4/2017)... NEW YORK , April 4, 2017   ... solutions, today announced that the United States Patent and ... The patent broadly covers the linking of an iris ... the same transaction) and represents the company,s 45 th ... our latest patent is very timely given the multi-modal ...
(Date:3/30/2017)... The research team of The Hong Kong Polytechnic University ... adopting ground breaking 3D fingerprint minutiae recovery and matching technology, pushing ... for use in identification, crime investigation, immigration control, security of access ... ... A research team led by Dr Ajay ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... representations of a complex biological network, a depiction of a system of linkages ... said Dmitry Korkin, PhD, associate professor of computer science at Worcester Polytechnic Institute ...
(Date:10/12/2017)... ... October 12, 2017 , ... DuPont Pioneer ... that they have entered into a multiyear collaboration to identify and characterize novel ... additional tools for gene editing across all applications. , Under the terms of ...
(Date:10/12/2017)... ... 2017 , ... BioMedGPS announces expanded coverage of SmartTRAK Business ... US Hemostats & Sealants. , SmartTRAK’s US Market for Hemostats and Sealants module ... and biologic sealants used in surgical applications. BioMedGPS estimates the market will grow ...
(Date:10/12/2017)... (PRWEB) , ... October 12, ... ... ) has launched Rosalind™, the first-ever genomics analysis platform specifically designed for ... complexity. Named in honor of pioneering researcher Rosalind Franklin, who made a ...
Breaking Biology Technology: