Preterm birth, a birth before the 37th week of pregnancy occurs for fewer than 8% of mothers but is associated with two-thirds of all fetal deaths and deaths of liveborn infants in the first month after birth. In the late 1990s those deaths are concentrated among very preterm births i.e. births before the 32nd week of pregnancy. Infants born very preterm are very likely to need neonatal intensive care, quite likely to have had major respiratory, infectious or other problems after birth, and to n ....Preterm birth, a birth before the 37th week of pregnancy occurs for fewer than 8% of mothers but is associated with two-thirds of all fetal deaths and deaths of liveborn infants in the first month after birth. In the late 1990s those deaths are concentrated among very preterm births i.e. births before the 32nd week of pregnancy. Infants born very preterm are very likely to need neonatal intensive care, quite likely to have had major respiratory, infectious or other problems after birth, and to need readmission to hospital in the first year after birth. Surviving infants are more likely to have major impairments, minor impairments, and school difficulties than infants born at term. There is a substantial impact on families, health services and society of very preterm birth.There has been no reduction in the proportion of births which are preterm, or very preterm in the last 20 years, though advances in treatment and care have markedly improved the survival of preterm and very preterm infants. This study will investigate the role of previous pregnancies which did not result in births (miscarriages and terminations), together with other procedures such as D and C (dilatation and curettage), in subsequent preterm birth. As these previous pregnancy losses are all fairly common experiences any associated risk is important and this particular factor has not been studied in this way before. There is preliminary evidence that they may be associated with preterm birth and the study will be able to measure the associations while taking into account all the other known risk factors. Other possible risk factors such as experiencing violence in pregnancy or social factors acting at a neighbourhood level will also be included. If it is found that previous pregnancy losses are independently associated with preterm birth it will be possible to develop and test preventive strategies.Read moreRead less
The starting point for this project is the recent finding that women who experience miscarriages or terminations of pregnancy before theuir first birth have an increased risk of having a preterm (premature) infant. These findings have prompted a re-evaluation of the relationship between the number of pregnancies a women has had and the likely outcome in later pregnancies. It will take into account the stage at which prior pregnancies ended, what the outcomes of the pregnancies were (birth, healt ....The starting point for this project is the recent finding that women who experience miscarriages or terminations of pregnancy before theuir first birth have an increased risk of having a preterm (premature) infant. These findings have prompted a re-evaluation of the relationship between the number of pregnancies a women has had and the likely outcome in later pregnancies. It will take into account the stage at which prior pregnancies ended, what the outcomes of the pregnancies were (birth, health baby, death, baby with a birth defect, termination, miscarriage etc), as well as factors such as maternal age, in relation to the risks in subsequent pregnancies. The expected outcomes and significance of the study are: * new evidence about factors causing adverse outcomes of pregnancy; * better information on the risk of recuurence of common birth defects; * more precise information on risks of adverse pregnancy outcomes for users and planners of maternity services.Read moreRead less