Resultados obstétricos y neonatales relacionados con la hidratación intraparto en mujeres atendidas de parto de bajo riesgo / Obstetric and neonatal results associated with intrapartum hydration for women with low-risk labour

Objetivo: determinar la influencia de la hidratación intraparto en los resultados obstétricos y neonatales en mujeres nulíparas atendidas por parto de bajo riesgo.Métodos: se realizó un estudio observacional prospectivo en el Hospital Universitario Puerta de Hierro Majadahonda (Madrid, España). Se incluyeron mujeres nulíparas con gestación única atendidas por parto de bajo riesgo. Se recogieron variables maternas (sociodemográficas, clínicas al ingreso, intraparto y en el puerperio inmediato, resultados obstétricos) y neonatales (datos al nacimiento, a las 24 y 48 horas). Se realizó análisis descriptivo y univariante con los test estadísticos correspondientes. Se valoró la influencia de la hidratación en los resultados obstétricos y neonatales estableciendo un punto de corte en la hidratación recibida intraparto (mediana volumen total administrado por hora: 300 mL/h).Resultados: se incluyeron 148 mujeres. Edad media (DE) 32 (4,4) años, edad gestacional media (DE) 39 (1,4) semanas. Al ingreso, la dilatación media fue de 2 cm. Parto inducido en 65,5% (n= 97). Los resultados obstétricos y neonatales fueron más favorables en las mujeres que recibieron un volumen mayor(> 300 mL/h), con diferencias significativas en la duración total del parto (mediana 526 vs. 735 min; p< 0,001), incidencia de parto por cesárea (14,3% frente 18,7%), fiebre (5,5% frente a 7,7%), incidencia de pérdida de peso neonatal superior al 7% a las 48 horas (28,6% frente a 39,8%), lactancia materna (94,6% frente a 82,4%).Conclusiones: la administración de un mayor volumen de líquidos a mujeres nulíparas durante el parto de bajo riesgo se asoció con mejores resultados obstétricos y neonatales.(AU)

Objective: to determine the influence of intrapartum hydration on obstetric and neonatal results in nulliparous women during low-risk labour.Methods: an observational prospective study was conducted at the Hospital Universitario Puerta de Hierro Majadahonda (Madrid, Spain). The study included nulliparous women with single pregnancy and low-risk labour. Maternal variables were collected (sociodemographic, clinical signs at admission, intrapartum and immediately post-partum, obstetric results) as well as neonatal variables (data at birth, at 24 and 48 hours). Descriptive and univariate analysis was conducted with the relevant statistic tests. The influence of hydration was assessed in obstetric and neonatal results, determining a cut-off point for the hydration received intrapartum (median total volume administered per hour: 300 mL/h).Results: the study included 148 women, with a mean age (SD) of 32 (4.4) years, and a mean gestational age (SD) of 39 (1.4) weeks. At admission, mean dilation was of 2 cm. There was induced labour in 65.5% of cases (n= 97). Obstetric and neonatal results were more favourable in those women who received a higher volume (≥ 300 mL/h), with significant differences in the total duration of labour (median 526 vs. 735 min; p< 0.001), incidence of Caesarean births (14.3% vs. 18.7%), fever (5.5% vs. 7.7%), incidence of neonatal weight loss >7% at 48 hours (28.6% vs. 39.8%), breastfeeding (94.6% vs. 82.4%).Conclusions: administration of a higher volume of fluids to nulliparous women during low-risk labour was associated with better obstetric and neonatal results.(AU)

Baby Friendly Hospital Initiative Breastfeeding Outcomes in Mothers with COVID-19 Infection During the First Weeks of the Pandemic in Spain.

BACKGROUND: Adherence to the Ten Steps of the Baby-Friendly Hospital Initiative has been shown to have a protective role for the initiation and maintenance of breastfeeding. RESEARCH AIMS: (1) To determine the breastfeeding rate during the first 6 months of life in children of mothers diagnosed with COVID-19 infection at the time of birth; and (2) to assess the possible influence of being born in a center with Baby-Friendly Hospital Initiative accreditation. METHODS: This was a two-group comparative longitudinal observational study of infants born to mothers with COVID-19 at the time of birth, between March 13-May 31, 2020 (the first wave of the pandemic) in Spain. Fourteen Spanish hospitals participated, five (35.7%) were Baby-Friendly Hospital Initiative accredited. Type of feeding was assessed prospectively at discharge, 1, 3, and 6 months of age. A total of 248 newborns were included in the study. RESULTS: A total of 117 (47.3%) newborns were born in Baby-Friendly Hospital Initiative (BFHI) accredited centers. These centers applied skin-to-skin contact with greater probability (OR = 1.9; 95% CI [1.18, 3.29]) and separated the newborns from their mothers less frequently (OR = 0.46; 95% CI [0.26, 0.81]) than non-accredited centers. No differences were observed in relation to the presence of a companion at the time of birth. At discharge, 49.1% (n = 57) of newborns born in BFHI-accredited centers received exclusive breastfeeding versus 35.3% (n = 46) in non-accredited centers (p = .03). No differences were observed in breastfeeding rates throughout follow-up. CONCLUSIONS: The exclusive breastfeeding rate at discharge in children of mothers with COVID-19 infection at birth was higher in Baby-Friendly Hospital Initiative accredited centers, which most frequently applied skin-to-skin contact at birth as well as rooming-in.

Maternal, Perinatal and Neonatal Outcomes With COVID-19: A Multicenter Study of 242 Pregnancies and Their 248 Infant Newborns During Their First Month of Life.

BACKGROUND: Our aim was to describe the clinical features of mothers with coronavirus disease 2019 (COVID-19) infection during gestation or delivery, and the potential vertical transmission. We also wish to evaluate the possible horizontal transmission after hospital discharge, by means of a follow-up of all the newborns included at 1 month of age. METHODS: This multicenter descriptive study involved 16 Spanish hospitals. We reviewed the medical records of 242 pregnant women diagnosed with COVID-19 from March 13 to May 31, 2020, when they were in their third trimester of pregnancy. They and their 248 newborn infants were monitored until the infant was 1 month old. RESULTS: Caesarean sections (C-sections) were performed on 63 (26%) women. The initial clinical symptoms were coughing (33%) and fever (29.7%). Mothers hospitalized due to COVID-19 pathology had a higher risk of ending their pregnancy via C-section (P = 0.027). Newborns whose mothers had been admitted due to their COVID-19 infection had a higher risk of premature delivery (P = 0.006). We admitted 115 (46.3%) newborn infants to the neonatal unit, of those, 87 (75.6%) were only admitted due to organizational circumstances. No infants died and no vertical or horizontal transmission was detected. Regarding type of feeding, 41.7% of the newborns received exclusive breast-feeding at discharge and 40.4% at 1 month. CONCLUSIONS: We did not detect COVID-19 transmission during delivery or throughout the first month of life in the newborns included in our study. Exclusive breast-feeding rates at discharge and at 1 month of age were lower than expected.

Efficacy of "optimal hydration" during labor: HYDRATA study protocol for a randomized clinical trial.

There is a lack of consensus in the international scientific community with respect to the most suitable hydration strategies when attending nulliparous women during low-risk births. This paper describes the protocol for a randomized controlled trial to compare two hydration strategies and their influence on maternal and neonatal morbidity. The study population consists of nulliparous women admitted to the obstetrics department of a University Hospital. The women are being randomized into two groups: the "optimal hydration" group, which will be guaranteed 300 ml/hr liquids (crystalloids and bottled mineral water) with a minimum diuresis of 35 ml/hr; and the "variability in hydration" group, which will receive intravenous (alternating normal saline, Ringer's lactate solution, glucose, or Voluven®) and clear (bottled mineral water or isotonic drinks [Aquarius®]) liquids, without any established perfusion rate, and without established minimum diuresis. Outcomes for mothers include duration of labor, cesarean section, fever, and dehydration. Outcomes for newborns are respiratory distress, hypoglycemia, hyponatremia, jaundice, weight loss over 48 hr, and breastfeeding difficulties. Analysis will be per-protocol. Administering optimal hydration may improve health and safety for mothers and their newborn and reduce maternal and neonatal morbidity. The study is registered at www.clinicaltrials.gov. The project received funding by the Ministry of Health of Spain and is approved by the Research Ethics Committee.

Cessation of breastfeeding in association with oxytocin administration and type of birth. A prospective cohort study.

BACKGROUND: Some studies have suggested an association between synthetic oxytocin administration and type of birth with the initiation and consolidation of breastfeeding. AIM: This study aimed to test whether oxytocin administration and type of birth are associated with cessation of exclusive breastfeeding at different periods. A second objective was to investigate whether the administered oxytocin dose is associated with cessation of exclusive breastfeeding. METHODS: We conducted a prospective cohort study (n=529) in a tertiary hospital. Only full-term singleton pregnancies were included. Four groups were established based on the type of birth (vaginal or cesarean) and the intrapartum administration of oxytocin. Follow-up was performed to evaluate the consolidation of exclusive breastfeeding at 1, 3 and 6months. FINDINGS: During follow-up, the proportion of exclusive breastfeeding decreased in all groups. After adjusting for confounding variables, the group with cesarean birth without oxytocin (planned cesarean birth) had the highest risk of cessation of exclusive breastfeeding (odds ratio [95% confidence interval], 2.51 [1.53-4.12]). No association was found between the oxytocin dose administered during birth and puerperium period and the cessation of exclusive breastfeeding. CONCLUSION: Planned cesarean birth without oxytocin is associated with the cessation of exclusive breastfeeding at 1, 3 and 6months of life. It would be desirable to limit elective cesarean births to essentials as well as to give maximum support to encourage breastfeeding in this group of women. The dose of oxytocin given during birth and puerperium period is not associated with cessation of exclusive breastfeeding.

A Comparison of Factors Associated with Cessation of Exclusive Breastfeeding at 3 and 6 Months.

AIM: To analyze the association of labor and sociodemographic factors with cessation of exclusive breastfeeding (EBF) at 3 and 6 months of life. MATERIALS AND METHODS: A prospective cohort study (n = 529) was performed in a tertiary hospital with the Baby-Friendly Hospital Initiative (BFHI) award. Labor and sociodemographic factors were investigated. Single-term newborns were included. After 3 and 6 months, telephone calls were made to determine the type of lactation. Univariate analysis was performed with the chi-square test or Fisher's exact test. Multivariable logistic regression models were developed to determine risk factors associated with cessation of breastfeeding at 3 and 6 months. RESULTS: At 3 months, 523 participants (98.9%) were contacted, of whom 64.4% maintained EBF. Factors associated with cessation were pacifier use (odds ratio [OR] 3.49; 95% confidence interval [95% CI] 2.24-5.43), cesarean delivery (OR 4.49; 95% CI 2.96-6.83), no college degree (OR 2.01; 95% CI 1.35-3.01), and not attending breastfeeding support groups (OR 1.96; 95% CI 1.22-3.12). At 6 months, 512 participants (96.8%) were contacted, of whom 31.4% maintained EBF. Factors associated with cessation were reintegration into the workplace (OR 4.49; 95% CI 2.96-6.83), pacifier use (OR 3.49; 95% CI 2.24-5.43), and primiparity (OR 1.61; 95% CI 1.05-2.46). CONCLUSIONS: Several risk factors are associated with the premature cessation of EBF. There is a need to define strategies to correct modifiable factors and to promote protective factors with the aim of improving the success rate of EBF to reach the recommendations of the World Health Organization.

The Relationship of the Administration of Intrapartum Synthetic Oxytocin and Breastfeeding Initiation and Duration Rates.

AIM: The consequences that intrapartum administration of hormones can have on breastfeeding are unclear. The aim of the study is to determine if synthetic intrapartum oxytocin, used routinely for induction/stimulation, has a relationship to initiation/duration of breastfeeding. PATIENTS AND METHODS: We conducted a cohort study that was carried out in a tertiary university hospital distinguished by WHO-UNICEF as a BFHI (Baby-Friendly Hospital Initiative). A group of 53 mother and newborn dyads who had been exposed to intrapartum synthetic oxytocin were compared with 45 nonexposed dyads. A breastfeeding questionnaire was administered by a midwife blind to patient group through phone calls 3 and 6 months after delivery. RESULTS: No statistically significant differences were observed between the two groups in the rates of mothers exclusively breastfeeding (EBF) or nonexclusively breastfeeding. The percentage of those who were EBF when discharged was 97.3% in the oxytocin-nonexposed group and 87.1% in the oxytocin-exposed group (p = 0.14). At 3 months, the group rates of exclusive breastfeeding were 72.5% in the nonoxytocin-exposed group versus 65.9% in the oxytocin-exposed group (p = 0.71). At 6 months, rates of breastfeeding were 31.4% versus 27.9% (p = 0.53) in the oxytocin-nonexposed and oxytocin-exposed groups, respectively. CONCLUSIONS: In this study, no statistically significant effect of intrapartum synthetic oxytocin administration was observed pertaining to the initiation or duration of breastfeeding.

Intrapartum synthetic oxytocin reduce the expression of primitive reflexes associated with breastfeeding.

AIM: Several synthetic peptide manipulations during the time surrounding birth can alter the specific neurohormonal status in the newborn brain. This study is aimed at assessing whether intrapartum oxytocin administration has any effect on primitive neonatal reflexes and determining whether such an effect is dose-dependent. MATERIALS AND METHODS: A cohort prospective study was conducted at a tertiary hospital. Mother-infant dyads who received intrapartum oxytocin (n=53) were compared with mother-infant dyads who did not receive intrapartum oxytocin (n=45). Primitive neonatal reflexes (endogenous, antigravity, motor, and rhythmic reflexes) were quantified by analyzing videotaped breastfeeding sessions in a biological nurturing position. Two observers blind to the group assignment and the oxytocin dose analyzed the videotapes and assesed the newborn's state of consciousness according to the Brazelton scale. RESULTS: The release of all rhythmic reflexes (p=0.01), the antigravity reflex (p=0.04), and total primitive neonatal reflexes (p=0.02) in the group exposed to oxytocin was lower than in the group not exposed to oxytocin. No correlations were observed between the dose of oxytocin administered and the percentage of primitive neonatal reflexes released (r=0.03; p=0.82). CONCLUSIONS: Intrapartum oxytocin administration might inhibit the expression of several primitive neonatal reflexes associated with breastfeeding. This correlation does not seem to be dose-dependent.

Newborn feeding behaviour depressed by intrapartum oxytocin: a pilot study.

AIM: To investigate the effect intrapartum oxytocin administration can have on Primitive Neonatal Reflexes. The secondary objective was to observe the influence of intrapartum oxytocin may have on breastfeeding. METHODS: Twenty healthy primiparae with a single gestation at term were included. To assess Primitive Neonatal Reflexes, video film was taken during an experimental situation designed to elicit Primitive Neonatal Reflexes. Three independent observers blinded to the oxytocin dose that had been administered coded the Primitive Neonatal Reflexes. Data regarding breastfeeding were collected by telephone at 3 months. RESULTS: Medium oxytocin dose was 1931.9 ± 1754.4 mUI. A Kappa index >0.75 was obtained for four Primitive Neonatal Reflexes: swallow, jaw jerk, suck and gazing. A negative association was found between oxytocin dose and sucking (p = 0.03). At 3 months of life, women exclusively breastfeeding (63.1%) had received a significantly lower average dose of oxytocin than those not exclusively breastfeeding (36.8%) (p = 0.04). CONCLUSION: In this pilot study, intrapartum exogenous oxytocin seems to disturb sucking and breastfeeding duration. Further studies are required to confirm these results and to ascertain whether there could be other effects of intrapartum oxytocin on newborn behaviour.