Esteriek de Miranda

Preventing preterm birth with progesterone: costs and effects of screening low risk women with a singleton pregnancy for short cervical length, the Triple P study

BackgroundWomen with a short cervical length in mid-trimester pregnancy have a higher risk of preterm birth and therefore a higher rate of neonatal mortality and morbidity. Progesterone can potentially decrease the number of preterm births and lower neonatal mortality and morbidity. Previous studies showed good results of progesterone in women with either a history of preterm birth or a short cervix. However, it is unknown whether screening for a short cervix and subsequent treatment in mid trimester pregnancy is effective in low risk women.Methods/DesignWe plan a combined screen and treat study among women with a singleton pregnancy without a previous preterm birth. In these women, we will measure cervical length at the standard anomaly scan performed between 18 and 22 weeks. Women with cervical length ≤ 30 mm at two independent measurements will be randomly allocated to receive either vaginal progesterone tablets or placebo between 22 and 34 weeks. The primary outcome of this trial is adverse neonatal condition, defined as a composite outcome of neonatal mortality and severe morbidity. Secondary outcomes are time to delivery, preterm birth rate before 32, 34 and 37 weeks, days of admission in neonatal intensive care unit, maternal morbidity, maternal admission days for preterm labour and costs. We will assess growth, physical condition and neurodevelopmental outcome of the children at two years of age.DiscussionThis study will provide evidence for the usefulness and cost-effectiveness of screening for short cervical length at the 18-22 weeks and subsequent progesterone treatment among low risk women.Trial registrationNetherlands Trial Register (NTR): NTR207

Costs and effects of screening and treating low risk women with a singleton pregnancy for asymptomatic bacteriuria, the ASB study

BackgroundThe prevalence of asymptomatic bacteriuria (ASB) in pregnancy is 2-10% and is associated with both maternal and neonatal adverse outcomes as pyelonephritis and preterm delivery. Antibiotic treatment is reported to decrease these adverse outcomes although the existing evidence is of poor quality.Methods/DesignWe plan a combined screen and treat study in women with a singleton pregnancy. We will screen women between 16 and 22 weeks of gestation for ASB using the urine dipslide technique. The dipslide is considered positive when colony concentration ≥105 colony forming units (CFU)/mL of a single microorganism or two different colonies but one ≥105 CFU/mL is found, or when Group B Streptococcus bacteriuria is found in any colony concentration. Women with a positive dipslide will be randomly allocated to receive nitrofurantoin or placebo 100 mg twice a day for 5 consecutive days (double blind). Primary outcomes of this trial are maternal pyelonephritis and/or preterm delivery before 34 weeks. Secondary outcomes are neonatal and maternal morbidity, neonatal weight, time to delivery, preterm delivery rate before 32 and 37 weeks, days of admission in neonatal intensive care unit, maternal admission days and costs.DiscussionThis trial will provide evidence for the benefit and cost-effectiveness of dipslide screening for ASB among low risk women at 16–22 weeks of pregnancy and subsequent nitrofurantoin treatment.Trial registrationDutch trial registry: NTR-3068

Preventing Preterm Birth with Progesterone in Women with a Short Cervical Length from a Low-Risk Population: A Multicenter Double-Blind Placebo-Controlled Randomized Trial

OBJECTIVE The objective of this study was to evaluate the effectiveness of vaginal progesterone in reducing adverse neonatal outcome due to preterm birth (PTB) in low-risk pregnant women with a short cervical length (CL). STUDY DESIGN Women with a singleton pregnancy without a history of PTB underwent CL measurement at 18 to 22 weeks. Women with a CL ≤ 30 mm received vaginal progesterone or placebo. Primary outcome was adverse neonatal outcome, defined as a composite of respiratory distress syndrome, bronchopulmonary dysplasia, intracerebral hemorrhage > grade II, necrotizing enterocolitis > stage 1, proven sepsis, or death before discharge. Secondary outcomes included time to delivery, PTB before 32, 34, and 37 weeks of gestation. Analysis was by intention to treat. RESULTS Between 2009 and 2013, 20,234 women were screened. A CL of 30 mm or less was seen in 375 women (1.8%). In 151 women, a CL ≤ 30 mm was confirmed with a second measurement and 80 of these women agreed to participate in the trial. We randomly allocated 41 women to progesterone and 39 to placebo. Adverse neonatal outcomes occurred in two (5.0%) women in the progesterone and in four (11%) women in the control group (relative risk [RR], 0.47; 95% confidence interval [CI], 0.09-2.4). The use of progesterone resulted in a nonsignificant reduction of PTB < 32 weeks (2.0 vs. 8.0%; RR, 0.33; 95% CI, 0.04-3.0) and < 34 weeks (7.0 vs. 10%; RR, 0.73; 95% CI, 0.18-3.1) but not on PTB < 37 weeks (15 vs. 13%; RR, 1.2; 95% CI, 0.39-3.5). CONCLUSION In women with a short cervix, who are otherwise low risk, we could not show a significant benefit of progesterone in reducing adverse neonatal outcome and PTB.

The capacity of mid-pregnancy cervical length to predict preterm birth in low-risk women: a national cohort study

We investigated the predictive capacity of mid‐trimester cervical length (CL) measurement for spontaneous and iatrogenic preterm birth.

Ethnic disparities in perinatal mortality at 40 and 41 weeks of gestation

Abstract Objective: To evaluate whether maternal ethnicity affects perinatal mortality by week of gestation from 39 weeks onwards. Study design: In this cohort study, we used data from the nationwide Netherlands Perinatal Registry from 1999 until 2008. All singleton infants born between 39+0 and 42+6 weeks of gestation without congenital anomalies were included. We used crude and multivariate logistic regression analyses with white Europeans as the reference to calculate the adjusted odds ratios (aOR) of South Asian, African and Mediterranean women. The main outcome measure was perinatal mortality (antepartum and intrapartum/neonatal mortality within 7 days after birth). Results: We studied 1,092,255 singleton deliveries. Perinatal mortality occurred in 2315 infants (2.1‰). There was interaction between gestational age and ethnicity (P<0.0001). In week 40 (40+0–40+6) South Asian (aOR 1.9; 95% CI 1.1–3.4) and Mediterranean (aOR 1.3; 95% CI 1.04–1.7) women had an increased risk of perinatal mortality. The perinatal mortality risk became greater in week 41 for South Asian (aOR 4.5 95% CI 2.8–7.2), African (aOR 2.2; 95%CI 1.4–3.4) and Mediterranean (aOR 2.2; 95% CI 1.8–2.9) women, especially among small for gestational age infants. Conclusion: With increasing gestational age beyond 39 weeks, perinatal mortality risk increases more strongly among South Asian, African and Mediterranean women compared to European whites.

Women's motivations for choosing a high risk birth setting against medical advice in the Netherlands: a qualitative analysis

BackgroundHome births in high risk pregnancies and unassisted childbirth seem to be increasing in the Netherlands. Until now there were no qualitative data on women’s motivations for these choices in the Dutch maternity care system where integrated midwifery care and home birth are regular options in low risk pregnancies. We aimed to examine women’s motivations for birthing outside the system in order to provide medical professionals with insight and recommendations regarding their interactions with women who have birth wishes that go against medical advice.MethodsAn exploratory qualitative research design with a constructivist approach and a grounded theory method were used. In-depth interviews were performed with 28 women on their motivations for going against medical advice in choosing a high risk childbirth setting. Open, axial and selective coding of the interview data was done in order to generate themes. A focus group was held for a member check of the findings.ResultsFour main themes were found: 1) Discrepancy in the definition of superior knowledge, 2) Need for autonomy and trust in the birth process, 3) Conflict during negotiation of the birth plan, and 4) Search for different care. One overarching theme emerged that covered all other themes: Fear. This theme refers both to the participants’ fear (of interventions and negative consequences of their choices) and to the providers’ fear (of a bad outcome). Where for some women it was a positive choice, for the majority of women in this study the choice for a home birth in a high risk pregnancy or an unassisted childbirth was a negative one. Negative choices were due to previous or current negative experiences with maternity care and/or conflict surrounding the birth plan.ConclusionsThe main goal of working with women whose birthing choices do not align with medical advice should not be to coerce them into the framework of protocols and guidelines but to prevent negative choices.Recommendations for maternity caregivers can be summarized as: 1) Rethink risk discourse, 2) Respect a woman’s trust in the birth process and her autonomous choice, 3) Have a flexible approach to negotiating the birth plan using the model of shared decision making, 4) Be aware of alternative delivery care providers and other sources of information used by women, and 5) Provide maternity care without spreading or using fear.

Less or more? Maternal requests that go against medical advice

PROBLEM AND BACKGROUND This study explores the experiences of Dutch midwives and gynaecologists with pregnant women who request more, less or no care during pregnancy and/or childbirth. METHODS All Dutch midwives and (trainee) gynaecologists were invited to fill out a questionnaire specifically designed for the purposes of this study. Holistic midwives were analysed separately from regular community midwives. FINDINGS Most maternity care providers in the Netherlands receive requests for less care than recommended at least once a year. The most frequently maternal requests were declining testing for gestational diabetes (66.3%), opting for a home birth in case of a high risk pregnancy (65.3%), and declining foetal monitoring during labour (39.6%). Holistic midwives are more convinced of an increasing demand for less care than community midwives (73.1% vs. 35.2%, p=<0.001). More community midwives than hospital staff reported to have declined one or more request for less care than recommended (48.6% vs. 27.9%, p=<0.001). The majority of hospital staff also receive at least one request for an elective caesarean section every year. DISCUSSION AND CONCLUSION Requests for more and less care than indicated during pregnancy and childbirth are equally prevalent in this study. However, a request for less care is more likely to be declined than a request for more care. Counselling women who disagree with their care provider demands time. In case of requests for less care, second best care should be considered.

When the Hospital Is No Longer an Option: A Multiple Case Study of Defining Moments for Women Choosing Home Birth in High-Risk Pregnancies in The Netherlands:

Some women in a high-risk pregnancy go against medical advice and choose to birth at home with a “holistic” midwife. In this exploratory multiple case study, grounded theory and triangulation were employed to examine 10 cases. The women, their partners, and (regular and holistic) health care professionals were interviewed in an attempt to determine whether there was a pattern to their experiences. Two propositions emerged. The dominant one was a trajectory of trauma, self-education, concern about paternalism, and conflict leading to a negative choice for holistic care. The rival proposition was a path of trust and positive choice for holistic care without conflict. We discuss these two propositions and make suggestions for professionals for building a trusting relationship using continuity of care, true shared decision making, and an alternative risk discourse to achieve the goal of making women perceive the hospital as safe again.

Repeated cervical length measurements for the verification of short cervical length

To determine if the verification of short cervical length with a repeated measurement improved the identification of patients with short cervical length at increased risk of preterm delivery.

Recurrence rate and outcome of postterm pregnancy, a national cohort study

OBJECTIVE To assess the recurrence rate of postterm delivery (gestational age at or beyond 42+0 weeks or 294 days) and to describe maternal and perinatal outcomes after previous postterm delivery. STUDY DESIGN From the longitudinal linked Netherlands Perinatal Registry database, we selected all singleton primiparous women who delivered between 37+0 and 42+6 weeks with a subsequent singleton pregnancy from 1999 to 2007. We excluded congenital abnormalities. We compared the recurrence rate of postterm delivery and risk of antenatal fetal death in women with and without a postterm delivery in their first pregnancy. We compared perinatal outcome (composite of perinatal mortality, Apgar score <7 and birth injury) and adverse maternal outcome (composite of maternal death, abruptio placentae, PPH>1000ml and blood transfusions) between women with a recurrent and a de novo postterm second pregnancy. RESULTS Our study population consisted of 233,327 women of whom 17,874 (7.7%) delivered postterm in the first pregnancy. In the second pregnancy, 2678 (15%) women had a recurrent postterm delivery compared to 8698 (4%) women with a de novo postterm delivery (odds ratio (OR) 4.2 95% confidence interval (CI) 4.0-4.4). Subgroup analysis in recurrent and de novo postterm delivery showed no differences in composite perinatal and composite maternal outcome (OR 1.0; CI 0.7-1.5, p=0.90 and OR 1.1, CI 0.9-1.4, p=0.16), adjusted for fetal position and mode of delivery). CONCLUSIONS Women with a postterm delivery in the first pregnancy have a higher risk of recurrent postterm delivery. Our data suggest that there is no difference in the composite adverse perinatal outcome between recurrent and de novo postterm delivery.