The goal of this randomized trial is to compare two methods of induction in a fetal growth restriction population. The main question it aims to answer is: • Is trans-cervical balloon superior to prostaglandins in reducing the cesarean section rate, without increasing neonatal morbidity? Participants will have an induction of labour by cervical ripening with trans-cervical balloon in the trans-cervical balloon catheter arm and with Prostaglandins in the Misoprostol arm. Researchers will compare two methods of induction: trans-cervical balloon and prostaglandins to see if trans-cervical balloon is associated with a lower risk of cesarean delivery.
Fetal growth restriction (FGR) is associated with increased perinatal morbidity and mortality in late pregnancy. Because of this higher risk of adverse perinatal outcome, induction of labor is often proposed and require cervical ripening when the cervix is not favorable, i.e. Bishop score less than 6. Two methods of cervical ripening are currently available and used: pharmacological (prostaglandins) and mechanical (trans-cervical balloon). Growth-restricted fetuses are a population at increased risk for non-reassuring fetal status and hypoxia during labor because of their lower weight. Prostaglandins can lead to cardiotocograph (CTG) tracing abnormalities by causing uterine tachysystole in normal-weight fetuses. Nevertheless, the question of the method of induction of labor has been poorly studied in the population of growth-restricted fetuses. None of the national and international societies reports in their guidelines which method of induction of labor should be offered to pregnancies complicated by a fetal growth restriction. A few retrospective studies are in favor of an increased risk of uterine tachysystole with consequences on the CTG tracing in the case of cervical ripening with prostaglandins compared to the trans-cervical balloon. However, the results of these studies lack robustness due to important methodological limitations. Because trans-cervical balloon is a mechanical method of cervical ripening, it may be less likely to cause uterine tachysystole and thus fewer non-reassuring fetal status. Thus, the risk of cesarean section in labor could be decreased compared with the use of prostaglandins in the growth-restricted fetal population. To date, there is no published quality randomized controlled trials on the optimal method of cervical ripening in induction of labor for FGR fetuses. The present large-scale randomized trial aim to define the preferred method of induction for these fetuses, associated with a lower risk of cesarean delivery. If it is demonstrated that one method of induction (trans-cervical balloon) is superior to another (prostaglandins) in reducing the cesarean section rate, without increasing neonatal morbidity, the results of our study are likely to lead to changes in national and international recommendations.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
774
Induction of labor by cervical ripening with trans-cervical balloon (Foley catheter).
Induction of labor by cervical ripening with Prostaglandins (Misoprostol per os)
CHU Bordeaux
Bordeaux, France
RECRUITINGcesarean section
Incidence of cesarean section defined as a cesarean birth regardless of the indication
Time frame: Day 1
duration of labor
Mean duration of labor (duration between admission to the labor room and delivery)
Time frame: Day 1
duration between cervical ripening and delivery
Mean duration between cervical ripening and delivery
Time frame: Day 1
oxytocin use
Incidence of oxytocin use (median of the maximal administered dosage)
Time frame: Day 1
operative delivery
Incidence of operative delivery (vacuum, forceps, spatula)
Time frame: Day 1
postpartum hemorrhage
Incidence of postpartum hemorrhage defined by blood loss \>500mL (defined according to the CNGOF criteria)
Time frame: Day 3
Mean total blood loss
Mean total blood loss (mL)
Time frame: Day 3
intra-uterine infectious
Incidence of intra-uterine infectious defined by a fever (maternal temperature equal to or greater than 38°C twice), associated to at least one of the two criterion: persistent fetal tachycardia \> 160 bpm, or purulent amniotic fluid (defined according to the CNGOF criteria).
Time frame: Day 5
iron administration
Incidence of postpartum intravenous iron administration
Time frame: Day 5
transfusion
Incidence of transfusion of blood products or blood
Time frame: Day 5
maternal thromboembolism event
Incidence of maternal thromboembolism event (deep venous thrombosis diagnosed using leg Doppler ultrasound or pulmonary embolism diagnosed using computed tomographic pulmonary angiography)
Time frame: Day 5
maternal satisfaction
Incidence of maternal satisfaction with a satisfaction questionnaire derived from the childbirth experience questionnaire and satisfaction questionnaire of TRAAP2 study
Time frame: Day 5
Mean duration of hospitalization
Mean duration of hospitalization
Time frame: Day 5
umbilical artery lactic acid
Incidence of umbilical artery lactic acid greater than 10mmol/l
Time frame: Day 1
umbilical artery pH
Incidence of umbilical artery pH of less than 7,05
Time frame: Day 1
neonatal Apgar Score
Incidence of neonatal 5 minutes Apgar Score of less than 7
Time frame: Day 1
neonatal hypoglycemia
Incidence of neonatal hypoglycemia (blood glucose \< 35 mg/L) requiring intravenous therapy
Time frame: Day 5
neonatal intensive care
Incidence of admission to neonatal intensive care unit or intermediate care unit
Time frame: Day 5
neonatal length of hospital stay
Mean neonatal length of hospital stay
Time frame: Day 5 up to Month 2
neonatal death before discharge
Incidence of neonatal death before discharge
Time frame: Day 1 up to Month 2
non-reassuring fetal status
Incidence of non-reassuring fetal status occurring after the beginning of the cervical ripening (including both cervical ripening and labor). Non-reassuring fetal status is defined by the Fédération Internationale de Gynécologie et d'Obstétrique (FIGO), who class the CTG tracing in 3 class: normal, suspicious and pathological 3. According to this classification, non-reassuring fetal status is defined as the presence of a suspicious or pathological CTG tracings, predictive of hypoxia/ neonatal acidosis status
Time frame: Day 1
cesarean section for non-reassuring fetal status
Incidence of cesarean section for non-reassuring fetal status
Time frame: Day 1
cesarean section for arrest of labor
Incidence of cesarean section for arrest of labor
Time frame: Day 1
neonatal ventilation
Incidence of the need for neonatal ventilation in the first 72 hours of life, defined by intubation, continuous positive airway pressure (CPAP) or high-flow nasal cannula
Time frame: Day 3
neonatal hypoxic-ischemic encephalopathy
Incidence of neonatal hypoxic-ischemic encephalopathy
Time frame: Day 1 up to Month 2
neonatal seizure
Incidence of neonatal seizure
Time frame: Day 1
neonatal infection
Incidence of neonatal infection (confirmed sepsis or pneumonia)
Time frame: Day 1 up to Day 28
neonatal meconium aspiration syndrome
Incidence of neonatal meconium aspiration syndrome,
Time frame: Day 5
birth trauma
Incidence of birth trauma (bone fracture, neurologic injury, or retinal hemorrhage),
Time frame: Day 5
neonatal intracranial or subgaleal hemorrhage
Incidence of neonatal intracranial or subgaleal hemorrhage,
Time frame: Day 5
neonatal arterial hypotensio
Incidence of neonatal arterial hypotension requiring pressor support
Time frame: day 1
Maternal Postpartum Depression
Defined by a score greater than 13 on the EPDS (Edinburgh Postpartum Depression Scale). The EPDS scale calculates a depressive symptom score ranging from 0 (no depression symptoms) to 30 (severe depression symptoms). Threshold values greater than 13 are used to identify women at high risk for postpartum depression.
Time frame: 2 months after delivery.
Posttraumatic Stress Disorder (PTSD)
Defined by a score greater than 33 on the IES-R (Impact of Event Scale - Revised) questionnaire or by the presence of all criteria from the DSM-IV (4th edition of the Diagnostic and Statistical Manual of Mental Disorders) (criteria A, B, C, D, E, and F) on the TES (Traumatic Event Scale). The IES-R measures the severity of PTSD symptoms over the past 7 days, with scores ranging from 0 (no PTSD symptoms) to 88 (extreme PTSD symptoms). The diagnosis of PTSD is made when the IES-R score is greater than 33. • Timeframe:
Time frame: 2 months after delivery.
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