Abstract: Since the first Oxford Survey of Childhood Cancer’s results were published, people have become more aware of the risks associated with prenatal exposure from diagnostic x rays. As a result, it has since been the subject of many studies. In this review, the results of recent epidemiological studies are summarized. The current international guidelines for diagnostic x-ray examinations were compared to the review. All epidemiological studies starting from 2007 and all relevant international guidelines were included. Apart from one study that involved rhabdomyosarcoma, no statistically significant associations were found between prenatal exposure to x rays and the development of cancer during 2007–2020. Most of the studies were constrained in their design due to too small a cohort or number of cases, minimal x-ray exposure, and/or data obtained from the exposed mothers instead of medical reports. In one of the studies, computed tomography exposure was also included, and this requires more and longer follow-up in successive studies. Most international guidelines are comparable, provide risk coefficients that are quite conservative, and discourage abdominal examinations of pregnant women.
BACKGROUND: Prenatal healthcare is likely to prevent adverse outcomes, but an adequate review of utilization and its determinants is lacking.OBJECTIVE: To review systematically the evidence for the determinants of prenatal healthcare utilization in high-income countries.METHOD: Search of publications in EMBASE, CINAHL and PubMed (1992-2010). Studies that attempted to study determinants of prenatal healthcare utilization in high-income countries were included. Two reviewers independently assessed the eligibility and methodological quality of the studies. Only high-quality studies were included. Data on inadequate use (i.e. late initiation, low-use, inadequate use or non-use) were categorized as individual, contextual and health behaviour-related determinants. Due to the heterogeneity of the studies, a quantitative meta-analysis was not possible.RESULTS: Ultimately eight high-quality studies were included. Low maternal age, low educational level, non-marital status, ethnic minority, planned pattern of prenatal care, hospital type, unplanned place of delivery, uninsured status, high parity, no previous premature birth and late recognition of pregnancy were identified as individual determinants of inadequate use. Contextual determinants included living in distressed neighbourhoods. Living in neighbourhoods with higher rates of unemployment, single parent families, medium-average family incomes, low-educated residents, and women reporting Canadian Aboriginal status were associated with inadequate use or entering care after 6 months. Regarding health behaviour, inadequate use was more likely among women who smoked during pregnancy.CONCLUSION: Evidence for determinants of prenatal care utilization is limited. More studies are needed to ensure adequate prenatal care for pregnant women at risk.
1 Maternity services across Europe during the pandemic has undergone changes to limit virus transmission; however, many changes are not evidence-based. 2 Although these changes were introduced to keep women, babies and healthcare staff safe, the exclusion of companions and the separation of mothers and babies is particularly antithetical to a human rights-based approach to quality care. 3 A poll of COST Action 18211 network members showed that inconsistency in the application of restrictions was high, and there were significant deviations from the recommendations of authoritative bodies. 4 Concerns have emerged that restrictions in practice may have longer term negative impacts on mothers and their families and, in particular, may impact on the long-term health of babies. 5 When practice changes deviate from evidence-based frameworks that underpin quality care, they must be monitored, appraised and evaluated to minimise unintended iatrogenic effects.
