Hospital Admission, Cerebral Palsy, Intellectual Disability And Birth Defects In Assisted Conception Infants.
Funder
National Health and Medical Research Council
Funding Amount
$115,110.00
Summary
We have recently completed a study examining the prevalence of birth defects in assisted conception infants born in Western Australia from 1993-1997. Contrary to reassuring claims by other researchers in this area, we found that assisted conception infants have a two-fold increased risk of being diagnosed with a major birth defect by one year of age. We now propose to examine other long-term health outcomes in these children. This study involves record linkage between the WA Reproductive Technol ....We have recently completed a study examining the prevalence of birth defects in assisted conception infants born in Western Australia from 1993-1997. Contrary to reassuring claims by other researchers in this area, we found that assisted conception infants have a two-fold increased risk of being diagnosed with a major birth defect by one year of age. We now propose to examine other long-term health outcomes in these children. This study involves record linkage between the WA Reproductive Technology Register and four other population-based databases. The prevalence of cerebral palsy, intellectual disability, hospital admission and birth defects in assisted conception children born in WA between 1993 and 2001 will be compared to that seen in all other Western Australian children born over the same time period. The collection of information on risks associated with assisted conception treatment is vital to allow adequate counselling of couples considering fertility treatment. Cerebral palsy, intellectual disability, birth defects and hospital admission are all serious adverse health outcomes and, despite the introduction of IVF to most Western countries twenty years ago, there are limited data in the literature concerning the occurrence of these conditions in assisted conception infants. Quantifying the contribution of assisted conception treatment to neonatal, infant and childhood morbidity and mortality is also important for the planning of health service provision. Although assisted conception births represent only a small proportion of total births in Australia, these infants may require a disproportionate level of health care services, such as neonatal intensive care treatment due to complications associated with preterm or multiple birth. The wide application of assisted conception treatment in Australia and the increased number of pregnancies achieved by these means reinforce the urgent need for valid data on the health of children born after these procedures.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
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
Genetic Factors That Predispose Low Birth Weight Babies To Increased Risk Of Hypertension And IGT.
Funder
National Health and Medical Research Council
Funding Amount
$95,440.00
Summary
Recent research internationally has revealed that development of the fetus during pregnancy is related to later risk of hypertension and diabetes. Low birth weight infants have higher risk. While research has shown that this can't entirely be explained by genes, it is possible that some genes amplify the effect of low birth weight. This project seeks to identify such genes by examining a set of likely candidates. The targeting of these genes has been based on the knowledge that hypertension and ....Recent research internationally has revealed that development of the fetus during pregnancy is related to later risk of hypertension and diabetes. Low birth weight infants have higher risk. While research has shown that this can't entirely be explained by genes, it is possible that some genes amplify the effect of low birth weight. This project seeks to identify such genes by examining a set of likely candidates. The targeting of these genes has been based on the knowledge that hypertension and diabetes are generally more common in populations that have evolved in the tropics and have more melanin pigment in their skin. The focus in this study, therefore, is on genes that are known to be more common in these populations and also appear to affect risk of blood pressure and diabetes.Read moreRead less
Perinatal Outcomes Following Treatment For Cervical Dysplasia
Funder
National Health and Medical Research Council
Funding Amount
$98,600.00
Summary
A very high proportion of women in Australia have regular cervical screening ('pap' tests) for early detection of any early abnormal changes of the cervix. Women with abnormalities are referred for further investigation and some go on to have the areas with abnormalities treated either by surgical removal of small amounts of tissue or by other heat or laser treatments of affected areas. Many women having these treatments are of child-bearing age and may not have had children, or may seek to have ....A very high proportion of women in Australia have regular cervical screening ('pap' tests) for early detection of any early abnormal changes of the cervix. Women with abnormalities are referred for further investigation and some go on to have the areas with abnormalities treated either by surgical removal of small amounts of tissue or by other heat or laser treatments of affected areas. Many women having these treatments are of child-bearing age and may not have had children, or may seek to have more children after treatment. There are unanswered questions about the extent to which any or all of these treatments might, by changes to the cervix, lead to preterm birth in any subsequent pregnancy. In the proposed study, records relating to women referred from 1982 to 2000 for assessment and possible treatment of cervical abnormalities at a major hospital will be linked to Victorian birth records from 1983 to 2001. This will allow a comparison of preterm birth in the group of women referred with cervical abnormalities, with preterm births in the Victorian population, and comparing women who do and don't have treatment, taking into account other important factors such as the mother's age, and her previous pregnancies. The information will be of value to women themselves, to gynaecologists and to screening services.Read moreRead less