Stillbirth Workup and Delivery Management

Post-Mortem Imaging to Investigate the Causes of Stillbirth in Australia: Views of Parents, Midwives and Obstetricians

INTRODUCTION

There is increasing interest regarding the role and value of post-mortem imaging in identifying the causes of stillbirth. We sought to understand the experiences of parents and the perceptions and practices of midwives and obstetricians regarding post-mortem imaging (computed tomography [CT], magnetic resonance imaging [MRI], ultrasound and X-rays of the baby), in the investigation of stillbirths, and how its use and perceived value compares to that of other stillbirth investigations.

METHODS

Cross-sectional, web-based surveys of parents who experienced stillbirth in Australia from 2018 to 2022 and midwives and obstetricians involved in the care of parents who experienced stillbirth in the same 5 years. Data were analysed descriptively.

RESULTS

Data from 68 parents and 94 midwives and obstetricians were included. According to parents, post-mortem imaging (CT, MRI, ultrasound and X-ray) were the least discussed (1%-16%) and performed (0%-13%) stillbirth investigations. Twenty-eight percent of midwives and obstetricians had recommended the option of post-mortem imaging to parents, while 45% felt that doing so was beyond their scope of practice. Relative to autopsy, midwives and obstetricians were often unsure of the value of MRI across a range of clinical scenarios, and CT, MRI, ultrasound and X-ray were the investigations least often discussed (17%-47%) with parents.

CONCLUSIONS

Post-mortem imaging is currently underutilised in the investigation of stillbirths. Education and training are needed to enhance maternity care professionals' awareness of the role and value of imaging for identifying the causes of stillbirths, and how best to discuss these investigations with families.

Understanding the clinical utility of stillbirth investigations: a scoping review

BACKGROUND

Investigating the causes of stillbirth is crucial for both parents and healthcare providers as it helps explain why the baby died, guides clinical care in future pregnancies, and aids in developing strategies to prevent stillbirth. The usefulness or utility of investigations for stillbirth is poorly defined and unclear. As a result, protocols for investigating the causes of stillbirth are currently based on clinical consensus and fail to prioritise investigative approaches that are most effective at determining a cause of death.

OBJECTIVES

The objectives of this scoping review were to identify the available evidence, key characteristics, and knowledge gaps regarding the utility of stillbirth investigations.

SEARCH STRATEGY

An a priori protocol was implemented and included a systematic search in MEDLINE, CINAHL, EMBASE, Scopus, and Cochrane from inception until 28 May 2024.

SELECTION CRITERIA

Studies examining stillbirth investigations, yield, and value were included.

DATA COLLECTION AND ANALYSIS

Data were collected using a purpose-built data extraction tool and an analysis was undertaken.

RESULTS

57 potentially eligible studies were identified, and 34 studies (with 11,410 stillbirths) were included. Three studies examined clinical utility using a comprehensive testing protocol. Definition of utility or value of investigations varied across the studies, classification system for cause of death and investigation protocols varied. Placental pathology was reported as the most useful investigation in 65%-96% of cases, identified a cause of death in 61-71% of cases and impacting the medical management in 36% of cases (13 studies, 5,169 stillbirths). Autopsy can identify the cause of death in 36-77% of cases and provided new information in 17-26% of cases (17 studies, 4,336 stillbirths). Genetic analysis was useful in 29% of cases (seven studies, 1,886 stillbirths). One study (512 stillbirths) examined the value of investigation by presenting clinical scenario.

CONCLUSIONS

This review indicates that Investigation protocols for stillbirth should include placental pathology, autopsy, and genetic testing. Future studies should address the value of tests by presenting clinical scenarios, use of a consistent definition of stillbirth, classification system and measurement of investigation value.

Validation of a tool for determining the clinical utility of stillbirth investigations

BACKGROUND

Up to 20% of all stillbirths and 45% of term stillbirths are currently classified as unexplained. Many of these stillbirths do not undergo currently recommended investigations. This may leave questions unanswered and not identify stillbirths with a recurrence risk in subsequent pregnancies.

AIMS

To validate a new tool (Stillbirth Investigation Utility Tool) to identify the clinical utility of investigations in stillbirth and the inter-rater agreement on cause of stillbirth using the Perinatal Society of Australia and New Zealand-Perinatal Death Classification (PSANZ-PDC).

MATERIALS AND METHODS

Thirty-four stillbirths were randomly selected for inclusion, each assessed independently by five blinded assessors. The investigations were grouped into three categories: clinical and laboratory; placental pathology; and autopsy examination. The cause of death was assigned at the end of each group. Outcome measures were clinical utility of investigations measured by assessor rated usefulness and inter-rater agreement on the assigned cause of death.

RESULTS

Comprehensive maternal history, maternal full blood count, maternal blood group and screen and placenta histopathology were useful in all cases. Clinical photographs were not performed and should have been performed in 50% of cases. The inter-rater agreement on cause of death assigned after all investigation results was 0.93 (95% CI 0.87-1.0).

CONCLUSIONS

The new Stillbirth Investigation Utility Tool showed very good agreement in assigning the cause of death using PSANZ-PDC. Four investigations were useful in all cases. Minor refinements will be made based on feedback to enhance usability for wider implementation in research studies to assess the yield of investigations in stillbirths.

Delivery characteristics in pregnancies with stillbirth: a retrospective case-control study from a tertiary teaching hospital

OBJECTIVES

We compared delivery characteristics and outcome of women with stillbirth to those with live birth.

METHODS

This was a retrospective case-control study from Helsinki University Hospital, Finland. The study population comprised 214 antepartum singleton stillbirths during 2003-2015. Two age-adjusted controls giving live birth in the same year at the same institution were chosen for each case from the Finnish Medical Birth Register. Delivery characteristics and adverse pregnancy outcomes were compared between the cases and controls, adjusted for gestational age.

RESULTS

Labor induction was more common (86.0 vs. 22.0%, p<0.001, gestational age adjusted odds ratio [aOR] 35.25, 95% confidence interval [CI] 12.37-100.45) and cesarean sections less frequent (9.3 vs. 28.7%, p<0.001, aOR 0.21, 95% CI 0.10-0.47) among women with stillbirth. Duration of labor was significantly shorter among the cases (first stage 240.0 min [115.0-365.0 min] vs. 412.5 min [251.0-574.0 min], p<0.001; second stage 8.0 min [0.0-16.0 min] vs. 15.0 min [4.0-26.0 min], p<0.001). Placental abruption was more common in pregnancies with stillbirth (15.0 vs. 0.9%, p<0.001, aOR 8.52, 95% CI 2.51-28.94) and blood transfusion was needed more often (10.7 vs. 4.4%, p=0.002, aOR 6.5, 95% CI 2.10-20.13). The rates of serious maternal complications were low.

CONCLUSIONS

Most women with stillbirth delivered vaginally without obstetric complications. The duration of labor was shorter in pregnancies with stillbirth but the risk for postpartum interventions and bleeding complications was higher compared to those with live birth.

Investigation and management of stillbirth: a descriptive review of major guidelines

Stillbirth is a common and devastating pregnancy complication. The aim of this study was to review and compare the recommendations of the most recently published guidelines on the investigation and management of this adverse outcome. A descriptive review of guidelines from the American College of Obstetricians and Gynecologists (ACOG), the Royal College of Obstetricians and Gynecologists (RCOG), the Perinatal Society of Australia and New Zealand (PSANZ), the Society of Obstetricians and Gynecologists of Canada (SOGC) on stillbirth was carried out. Regarding investigation, there is consensus that medical history and postmortem examination are crucial and that determining the etiology may improve care in a subsequent pregnancy. All guidelines recommend histopathological examination of the placenta, genetic analysis and microbiology of fetal and placental tissues, offering less invasive techniques when autopsy is declined and a Kleihauer test to detect large feto-maternal hemorrhage, whereas they discourage routine screening for inherited thrombophilias. RCOG and SOGC also recommend a complete blood count, coagulopathies' testing, anti-Ro and anti-La antibodies' measurement in cases of hydrops and parental karyotyping. Discrepancies exist among the reviewed guidelines on the definition of stillbirth and the usefulness of thyroid function tests and maternal viral screening. Moreover, only ACOG and RCOG discuss the management of stillbirth. They agree that, in the absence of coagulopathies, expectant management should be considered and encourage vaginal birth, but they suggest different labor induction protocols and different management in subsequent pregnancies. It is important to develop consistent international practice protocols, in order to allow effective determination of the underlying causes and optimal management of stillbirths, while identifying the gaps in the current literature may highlight the need for future research.

Prospective cohort study: Causes of stillbirth in Australia 2013-2018

BACKGROUND

Stillbirth is a major public health problem that is slow to improve in Australia. Understanding the causes of stillbirth through appropriate investigation is the cornerstone of prevention and important for parents to understand why their baby died.

AIM

The aim of this study is to assess compliance with the Perinatal Society of Australia and New Zealand (PSANZ) Perinatal Mortality Clinical Practice Guidelines (2009) for stillbirths.

METHODS

This is a prospective multi-centred cohort study of stillbirths at participating hospitals (2013-2018). Data were recorded into a purpose-built database. The frequency of the recommended core investigations was calculated, and χ² test was performed for subgroup analyses by gestational age groups and timing of fetal death. A 70% compliance threshold was defined for investigations. The cause of death categories was provided according to PSANZ Perinatal Death Classification.

RESULTS

Among 697 reported total stillbirths, 562 (81%) were antepartum, and 101 (15%) were intrapartum. The most common cause of death categories were 'congenital abnormality' (12.5%), 'specific perinatal conditions' (12.2%) and 'unexplained antepartum death' (29%). According to 2009 guidelines, there were no stillbirths where all recommended investigations were performed (including or excluding autopsy). A compliance of 70% was observed for comprehensive history (82%), full blood count (94%), cytomegalovirus (71%), toxoplasmosis (70%), renal function (75%), liver function (79%), external examination (86%), post-mortem examination (84%) and placental histopathology (92%). The overall autopsy rate was 52%.

CONCLUSIONS

Compliance with recommended investigations for stillbirth was suboptimal, and many stillbirths remain unexplained. Education on the value of investigations for stillbirth is needed. Future studies should focus on understanding the yield and value of investigations and service delivery gaps that impact compliance.

A randomized controlled trial comparing isosorbide dinitrate-oxytocin versus misoprostol-oxytocin at management of foetal intrauterine death

Background

The metabolic activity of endogenous nitric oxide (NO) and the medical use of nitrovasodilatory drugs like isosorbide dinitrate have been shown to be potential inducers inducers of cervical ripening prior to surgical evacuation of the uterus.

Objective

To assess the therapeutic efficacy and safety of combined isosorbide dinitrate-oxytocin in the management of intrauterine foetal death (IUFD).

Methods

Sixty women with IUFD after 20 weeks of gestation requesting uterine evacuation were randomly selected to receive isosorbide dinitrate gel solution (80 mg/1.5 mL; n = 30) or misoprostol gel solution (100 mcg/1.5 mL; n = 30) every 3 h with a maximum of four doses or until a Bishop score >7 was reached. Subsequently, patients received a high dose of intravenous oxytocin until complete uterus evacuation was achieved. Therapeutic efficacy was evaluated by mean the relative risk of the foetal expulsion based on comparison of event rates, and the proportion of women induced to labor at 7, 10 and 15 h after the administration of isosorbide dinitrate or misoprostol. Safety was assessed on the basis of woman´s vital signs and evaluation of adverse effects, including headache, abdominal pain, pelvic pain, lower back pain, nausea, dizziness and vomiting.

Results

The foetal expulsion rate using the isosorbide dinitrate-oxytocin combination was approximately 4.4 times, and at least 2.1 times, the foetal expulsion rate with the misoprostol-oxytocin regimen at any given point in time. The proportion of women achieved vaginal delivery at 15 hours was 100% for the isosorbide dinitrate-oxytocin group and 86.7% for the misoprostol-oxytocin group. The average delivery induction interval was significantly lower when isosorbide dinitrate-oxytocin was used (8.7 ± 3.1 h) than when misoprostol-oxytocin (11.9 ± 3.1 h) was used. A total of 20% of patients in the isosorbide dinitrate-oxytocin group recorded headache, and no cases of uterine tachysystole, haemorrhage or coagulopathy were recorded.

Conclusion

This study indicates that intravaginal isosorbide dinitrate followed by intravenous oxytocin was more effective than the conventional method used to induce labour in the medical management of foetal death in pregnancies after 20 weeks of gestation.

Trial registration

Clinicaltrials.gov NCT02488642.

Hospital Practices for Parents Following Perinatal Loss

The aim of this study is to provide comprehensive and current information on hospital practices following perinatal death. The provinces with the highest number of hospitals in Turkey were selected for the study. To collect data, the questionnaire form of Canadian hospitals maternity policies and practices survey was sent to the appropriate respondents in hospitals. The study showed that encouraging parents to have photos of the deceased baby and preparing a remembrance pack were the most problematic issues and were not available at the majority of hospitals. The most common supportive practices in hospitals were the opportunity to see the deceased baby, assisting with funeral options and autopsies, and support for completing the necessary legal documents. The result indicated that hospitals implement varied practices in assisting the bereaved parents. The study recommended developing hospital policies and practices related to perinatal death and supporting families during their loss and grief.

Perinatal death investigations: What is current practice?

Perinatal death (PD) is a devastating obstetric complication. Determination of cause of death helps in understanding why and how it occurs, and it is an indispensable aid to parents wanting to understand why their baby died and to determine the recurrence risk and management in subsequent pregnancy. Consequently, a perinatal death requires adequate diagnostic investigation. An important first step in the analysis of PD is to identify the case circumstances, including relevant details regarding maternal history, obstetric history and current pregnancy (complications are evaluated and recorded). In the next step, placental examination is suggested in all cases, together with molecular cytogenetic evaluation and fetal autopsy. Investigation for fetal-maternal hemorrhage by Kleihauer is also recommended as standard. In cases where parents do not consent to autopsy, alternative approaches such as minimally invasive postmortem examination, postmortem magnetic resonance imaging, and fetal photographs are good alternatives. After all investigations have been performed it is important to combine findings from the clinical review and investigations together, to identify the most probable cause of death and counsel the parents regarding their loss.

Management of stillbirth delivery

Stillbirth is a common adverse outcome of pregnancy. Management should be individualized based on gestational age, maternal condition, prior uterine surgery, availability of skilled professionals, and maternal desires. This article discusses available data on management by gestational age and prior uterine surgery. Expectant management is a viable option for women and families who desire it and do not have any contraindications. In the second trimester, misoprostol induction and dilatation and evacuation are effective in the evacuation of the uterus. In the third trimester, induction of labor with prostaglandins, mechanical dilators, and augmentation with oxytocin is appropriate. Care should be taken with women with prior cesarean delivery; prostaglandins ideally should be avoided. Delivery by cesarean section should be performed selectively, i.e., when there is a maternal indication.

Clinical management of the induction of labor in intrauterine fetal death: evaluation of incidence of cesarean section and related conditions

OBJECTIVE

To assess the incidence and conditions associated with cesarean section in a cohort of pregnant women with intrauterine fetal death (IUFD), and clinical management to anticipate the childbirth.

METHODS

It was a retrospective cohort study with 163 mothers with IUFD, at the second half of pregnancy, who were managed to anticipate childbirth using pharmacological preparations and/or a mechanical method (Foley catheter) in a teaching hospital in Rio de Janeiro State, Brazil. Cox regression was used to evaluate the effect of the clinical methods on the kind of delivery.

RESULTS

The Subgroups A (misoprostol or Oxytocin), B (misoprostol and Oxytocin), and C (Foley catheter alone or combined with misoprostol and/or Oxytocin) were formed according to the applied methods. Nine out of 163 cases ended with cesarean section. The incidence of cesarean section was 3.5 per 1,000 people-hours, meaning that a pregnant woman with IUFD had a 15.6% risk of cesarean section during the first 48 hours of clinical management to anticipate childbirth. The conditions significantly associated with the mode of delivery were placental abruption (HR: 44.97), having two or more previous cesarean deliveries (HR: 10.03), and mechanical method with Foley catheter (HR: 5.01).

CONCLUSION

Cesarean section was an essential conduct in this cohort and followed previous cesarean delivery and placental abruption. The effect of the mechanical method on the abdominal route suggests that the Foley catheter method was used in the most difficult cases and that the surgery was performed to ensure maternal health.

Support for mothers, fathers and families after perinatal death

BACKGROUND

Provision of an empathetic, sensitive, caring environment and strategies to support mothers, fathers and their families experiencing perinatal death are now an accepted part of maternity services in many countries. Interventions such as psychological support or counselling, or both, have been suggested to improve outcomes for parents and families after perinatal death.

OBJECTIVES

To assess the effect of any form of intervention (i.e. medical, nursing, midwifery, social work, psychology, counselling or community-based) on parents and families who experience perinatal death.

SEARCH METHODS

We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (28 January 2013) and article bibliographies.

SELECTION CRITERIA

Randomised trials of any form of support aimed at encouraging acceptance of loss, bereavement counselling, or specialised psychotherapy or counselling for mothers, fathers and families experiencing perinatal death.

DATA COLLECTION AND ANALYSIS

Two review authors independently assessed eligibility of trials.

MAIN RESULTS

No trials were included.

AUTHORS' CONCLUSIONS

Primary healthcare interventions and a strong family and social support network are invaluable to parents and families around the time a baby dies. However, due to the lack of high-quality randomised trials conducted in this area, the true benefits of currently existing interventions aimed at providing support for mothers, fathers and families experiencing perinatal death is unclear. Further, the currently available evidence around the potential detrimental effects of some interventions (e.g. seeing and holding a deceased baby) remains inconclusive at this point in time. However, some well-designed descriptive studies have shown that, under the right circumstances and guided by compassionate, sensitive, experienced staff, parents' experiences of seeing and holding their deceased baby is often very positive. The sensitive nature of this topic and small sample sizes, make it difficult to develop rigorous clinical trials. Hence, other research designs may further inform practice in this area. Where justified, methodologically rigorous trials are needed. However, methodologically rigorous trials should be considered comparing different approaches to support.

[Antiphospholipid syndrome and pregnancy]

Antiphospholipid syndrome is characterized by arterial and venous thromboembolic events and persistent laboratory evidence of antiphospholipid antibodies. Obstetric complications such as recurrent miscarriage, early delivery, oligohydramnios, prematurity, intrauterine growth restriction, fetal distress, fetal or neonatal thrombosis, pre-eclampsia/eclampsia, and HELLP syndrome are also hallmarks of antiphospholipid syndrome. This syndrome is one of the diseases associated with the most severe thrombotic risk. Changes in the hemostatic system during normal pregnancy also result in a hypercoagulable state resulting in elevated thrombotic risk. Thromboembolic events are responsible of the vast majority of maternal and fetal deaths. Administration of appropriate thromboprophylaxis helps prevent thromboembolic complications during pregnancy in women with antiphospholipid syndrome and also give birth to healthy children. It is important to centralize the medication and management of these patients. It helps in the thoughtful care of these pregnant women encountering serious problems.

Antiphospohlipid syndrome in obstetrics

Antiphospholipid syndrome is characterised by a variety of clinical and immunological manifestations. The clinical hallmarks of this syndrome are thrombosis and poor obstetric outcomes, including miscarriages, fetal loss and severe pre-eclampsia. The main antiphospholipid antibodies include lupus anticoagulant, anticardiolipin and anti-β2-glycoprotein I. The combination of aspirin and heparin is considered the standard of care for women with antiphospholipid syndrome and embryo-fetal losses; however, aspirin in monotherapy may have a place in women with recurrent early miscarriage. A good benefit-risk ratio of low-molecular-weight heparin in pregnancy thrombosis treatment has been reported. Warfarin must be avoided if possible throughout the first trimester of pregnancy. Adequate pregnancy management of women with antiphospholipid syndrome should include co-ordinated medical-obstetrical care, a close follow-up protocol and a good neonatal unit. Close blood pressure control and early detection of proteinuria, together with Doppler studies of the utero-placental circulation should be included in the management protocol.

Genome-wide array-based copy number profiling in human placentas from unexplained stillbirths

OBJECTIVE

Accumulating evidence suggests that genomic structural variations, particularly copy number variations (CNV), are a common occurrence in humans that may bear phenotypic consequences for living individuals possessing the variant. While precise estimates vary, large-scale karyotypic abnormalities are present in 6-12% of stillbirths (SB). However, due to inherent limitations of conventional cytogenetics, the contribution of genomic aberrations to stillbirth is likely underrepresented. High-resolution copy number variant analysis by genomic array-based profiling may overcome such limitations.

METHODS

Prospectively acquired SB cases > 22 weeks underwent classification of 'unexplained' stillbirth by Wigglesworth and Aberdeen criteria after extensive testing and rigorous multidisciplinary audit. Genome-wide analysis was conducted using high-resolution Illumina single nucleotide polymorphism (SNP) arrays (Human CNV370-Duo) on placental and fetal samples. Potential alternate detection methods were completed by one or more of three independent means (quantitative PCR, Illumina1M, or Agilent105K comparative genomic hybridization arrays).

RESULTS

In our cohort of 54 stillbirths, 29 met strict unexplained criteria. Among these, we identified 24 putative novel CNVs. Subsequent interrogation detected 18 of 24 CNVs (75%) in placental samples, 8 of which were also confirmed in available fetal samples; none were present in maternal blood.

CONCLUSION

We describe the potential of whole-genome placental profiling to identify small genomic imbalances, which might contribute to a small proportion of well-characterized, unexplained stillbirths.