Active clinical trials for "Premature Birth"

Pharmacokinetics analysis and development of pharmacokinetics model in pregnancy women and fetus

This is a longitudinal, observational study on nutrition, growth and body composition in preterm infants. Aims to determine the adequacy of actual nutrient intake during the preterm period by investigating associations between macronutrient supply, growth, and body composition at 34-weeks gestation, term equivalent and 2-month corrected gestational age.

In the neonatal period, the human kidney is characterized by a functional immaturity responsible for an impaired ability to regulate water and sodium homeostasis, which is exacerbated by prematurity. This altered sodium handling could be related to a partial renal aldosterone resistance. Renal sodium reabsorption and potassium excretion are mainly controlled by aldosterone, after binding to the mineralocorticoid receptor (MR). The investigators have analyzed MR expression throughout human and mouse renal development, and the investigators found a weak MR expression at birth. The investigators have conducted a pilot study in full-term newborns, which confirmed a partial neonatal aldosterone resistance. This study also highlighted that urinary aldosterone is the best index to accurately assess aldosterone sensitivity at birth.

The Premature ovarian failure (POF) is a rare syndrome observed in women under 40 who induced estrogen deficiency and often leads to infertility final. The etiologies of POF remain unknown in more than 85% of cases. There are 5-10 % of familial cases.The main objective of this study is to recruit, phenotype and genotype 20 families with at least two subjects with nonsyndromic POF in order to identify new loci using a single technical standard nucleotide polymorphisms (SNPs). This study will also include related population and population control.

The purpose of this study is to try to evaluate the maturation of the autonomic nervous system in prematures.

In survivors of extreme prematurity to 36 weeks Post Menstrual Age (PMA), specific biologic, physiologic and clinical data obtained during the initial hospitalization will predict respiratory morbidity as defined by respiratory health care utilization and respiratory symptoms, between discharge and 1 year corrected age. This protocol describes a collaboratively developed multicenter study of very preterm infants from birth through the time of discharge from the Neonatal Intensive Care Unit (NICU) and up to 1 year of age, corrected for the degree of prematurity.

Premature rupture of membranes is an important cause of neonatal morbidity and mortality, mainly because of the complications associated with this pathology (oligohydramnios, cord compression or prolapse, infection). When rupture of the membranes occur the risk of cord compression increases but there is little evidence regarding this complication and amniotic fluid volume. The investigator's focus are the perinatal outcomes according to amniotic fluid volume (< 5 or >5).

The heart rate variability assessment of the sympathetic-parasympathetic balance is a strong analytical tool in the autonomic nervous system (ANS) physiology, at each end of life. In neonatology, it represents an important marker for understanding the breath and cardiac dysfunction, incriminated in the pathophysiology of unexplained death syndrome and apnea-bradycardia of prematurity. If recent clinical studies conducted by our team highlight a close link between the maturation degree of the ANS and gestational or postnatal age, with a substantial autonomic dysfunction in preterm infants, no study to date has focused profile autonomic maturation in the first two years of life, as that period for the infant is a vulnerability "window" especially cardiopulmonary and neurological. Psychomotor prognosis of newborns is more serious if prematurity is important and if periventricular leukomalacia or cortical anatomical brain lesions are obvious. However, the conventional imaging (Trans fontanel ultrasound, CT, MRI) is not sufficient in the neonatal period to thoroughly evaluate the neurological risk situations. During the neonatal period, the assessment of autonomic control, in practice easily quantifiable from time and frequency-domain analysis of cardiac RR variability, could be a strong marker, at a given time, from a neurological disorder undetectable by imaging, including sympathetic and parasympathetic nerve conduction dysfunction in some brainstem nuclei and cortical areas. The postnatal profile of the autonomic balance, as a marker of well ANS regulation could become an additional support to correlate transient or permanent autonomic deficit with a psychomotor development disorder at 2 years of age or later. This tool could be a help to target the children with a neurological risk and to schedule early therapeutic interventions and psychological or educational support.

The aim of the present study is to describe the performance of very low birth-weight preterm toddlers regarding expressive language and cognitive development during sensorimotor and beginning of pre-operational periods, as well as to compare the performance presented by these children to that presented by their full-term peers, according to Genetic Epistemology theoretical principles. The hypothesis of this study is that very-low birth weight preterms would present a poorer performance, concerning expressive language and cognition development,than their full-term peers.

Observational study to determine whether the proposed method of fFN specimen collection without a speculum is substantially equivalent to the approved method with a speculum examination when obtained at the gestational age of ≥ 24 weeks and ≤ 34, 6 days in symptomatic women and at the gestational age of ≥ 22 weeks, 0 days and ≤ 30, 6 days in asymptomatic women. A finding of substantial equivalency would support a modification to the labeling to allow the collection of specimens for fFN determination with or without a speculum examination.