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.