�New research to be published in BJOG: An International Journal of Obstetrics and Gynaecology examines the results of maternal smoking on nativity outcomes.
Previous studies have focused on the consequences of smoking during each pregnancy, in isolation. This new study analysed outcomes according to whether women continued to smoke in successive pregnancies, or managed to give up smoking after their first maternity. Previous pregnancy outcomes were compared to subsequent maternity outcomes in the same sample population.
244, 840 mothers from New South Wales, Australia who had two consecutive singleton deliveries over the period 1994 - 2004 were studied by Dr Mohammed Mohsin and Professor Bin Jalaludin at Liverpool Hospital in Sydney. The majority of women were between 25 to 34 years old and 87% had antepartum care by the 20th week of pregnancy. The interval betwixt first and second nestling was between 12 - 24 months in a third of mothers studied.
The proportions of mothers who smoked were 18.7% during the first pregnancy and 17.5% in the second gestation. Researchers plant that 72.7% of smokers in their kickoff pregnancy continued to mary Jane in their second maternity.
Preterm births were the result in 5.9% of all first and 4.9% of all second deliveries. The findings indicate that mothers wHO had a previous preterm birth were at an increased risk of a repeat preterm birth in the next pregnancy. Researchers found the risk of having a preterm birth in a subsequent gestation was increased for those who carried on smoking and was greatest for heavy smokers.
Low parentage weight (LBW) was seen in 5.2% of all outset and 3.8% of all second gear births. Continued smoking in the subsequent pregnancy was associated with the highest rate of LBW infants. Researchers ground that if a mother continued to smoke heavily during her second maternity, the betting odds ratio of a low birthweight baby (compared with babies of women wHO never smoked) was 4, compared with 2.1 if she gave up completely.
Others findings from the written report point to the increased risk of poor perinatal outcomes associated with smoke, namely; stillbirths and neonatal deaths. Researchers believe that smoking
