Treatment of pregnant women with asymptomatic trichomoniasis does not prevent preterm delivery. Routine screening and treatment of asymptomatic pregnant women for this condition cannot be recommended.

Objective To evaluate the relationship of maternal antenatal magnesium sulfate (MgSO4) with neonatal cranial ultrasound abnormalities and cerebral palsy (CP). Study design In a randomized trial of MgSO4 or placebo in women at high risk of preterm delivery, up to three cranial ultrasound were obtained in the neonatal period. Images were reviewed by at least two pediatric radiologists masked to treatment and other clinical conditions. Diagnoses were predefined for intraventricular hemorrhage (IVH), periventricular leukomalacia (PVL), intracerebral echolucency or echodensity, and ventriculomegaly. CP was diagnosed at two years by standardized neurological examination. Results Intraventricular hemorrhage, PVL, intracerebral echolucency or echodensity, and ventriculomegaly were all strongly associated with an increased risk of CP. MgSO4 administration did not affect the risk of cranial ultrasound abnormality observed at 35 weeks post-menstrual age or later. However, for the 82% of infants born at <32 weeks gestation, MgSO4 was associated with a reduction in risk of echolucency or echodensity. The reduction in risk for echolucency explained 21% of the effect of MgSO4 on CP (p=0.04), and for echodensity explained 20% of the effect (p=0.02). Conclusions MgSO4 given prior to preterm delivery was associated with decreased risk of developing echodensities and echolucencies at <32 weeks gestation. However, this effect can only partially explain the effect of MgSO4 on CP at two years of age.

1268 Mala gestión del tiempo en los estudiantes universitarios 2018, Universitat Politècnica de ValènciaCongreso IN-RED (2018) Palabras clave: Procrastinación; gestión del tiempo; trabajo académico; resultados académicos IntroducciónLa procrastinación es considerada como un tipo de comportamiento de postergación o hábito de retraso de actividades o situaciones, asociados a resultados negativos (Ellis y Knaus, 1977;Silver y Sabini, 1981). En concreto, la procrastinación académica ha sido definida como la posposición de las tareas académicas (preparación de exámenes y realización de deberes y trabajos) para el último minuto (Slomon y Rothblum, 1984). Según los estudios realizados, se estima que un 80-95% de los estudiantes universitarios, o por lo menos la mitad de ellos presentan, un comportamiento de procrastinación académica (O'Brien, 2002;Ozer et al., 2009). Asimismo, este tipo de comportamiento parece ser un fenómeno que va en aumento (Steel, 2007). Además, la procrastinación ha sido correlacionada de forma negativa con el rendimiento académico (Ariely y Wertrnbrich, 2002;Wong, 2008;Kim y Seo, 2015). Estos efectos negativos se manifiestan en la nota media de los estudiantes y las notas de las areas y trabajos desarrollados por los estudiantes (Steel et al., 2001;Kim y Seo, 2015).En el contexto académico, la característica 'procrastinación' incluye la motivación y el éxito, así como las habilidades para la planificación y gestión, disciplina, auto-control y habilidades cognitivas para el estudio (Schouwenbrug, 1995). Es por ello que la procrastinación tiene importantes consecuencias negativas en los estudiantes universitarios, como la pérdida de tiempo, mal rendimiento académico, aumento del estrés, ansiedad y depresión (Chu y Choi, 2005, Essau et al., 2008. Estos factores conducen a un aumento de la presión debido a la escasez de tiempo, lo que a su vez se traduce en una reducció en la precisión, y consecuentemente sobre el rendimiento académico (Van Eerde, 2003).Para poder poner solución a este problema, se ha ahondado en el estudio de las causas que conllevan a la procrastinación. Son diversas los motivos que se han encontrado por los que los estudiantes tienden a procrastinar. Entre estos se encuentran el miedo al fracaso (Solomon y Rothblum, 1984) y la aversión hacia las tareas (Solomon y Rothblum, 1984;Steel, 2007). Más recientemente, Thakkar (2010) recoge la teoría de que las nuevas tencologías han generado grandes distractores como las actividades con ordenadores: la mensajería instantánea, la constante comprobación del correo, el amplio contenido mediático en la red (noticias, vídeos, música) y redes sociales; así como la televisión y los móviles. Además, también estalece un cambio en los valores de los estudiantes de la sociedad moderna (con objetivos futuros y de trabajo duro), a la sociedad post-moderna (preferencia por las actividades sociales y el placer). Frcuentemente los estudiantes se encuentran que el tiempo para la realización de las actividades académicas y de ocio es limitado,...

The contemporary society demands proffessionals with competences directly conected to information and communication technology (ICT)

The general aim of this thesis was to reproductively characterize females from a rabbit line selected for growth rate (line R) and to evaluate the effect of different nutritional strategies (ad libitum and restricted before reproduction), in order to improve the reproductive performance of these females.In chapter 1, the influence of maternal and embryonic genotype on prenatal survival and fetal growth over gestation was evaluated and contrasted with a maternal line. Prenatal survival, fetal weight and fetal placenta weight were affected by both embryonic and maternal genotype. Firstly, embryonic genotype was a main factor at Days 14 and 24 and maternal genotype contributed at Day 30 of prenatal survival. Secondly, differences in fetal weight were only manifested at Day 14, the embryonic/maternal genotype from the maternal line being the heaviest (0.29±0.01 g vs. 0.19±0.01 g, for line R genotypes). However, while for fetal placenta weight both genotypes showed an effect at Day 24, for maternal placenta weight they were relevant at Day 30. Nevertheless, no differences were detected either at transcriptomic level in fetal placenta or in progesterone and IGF-I plasma levels in these females. From this chapter it may be concluded that in rabbit females from paternal lines both embryonic and maternal genotypes are key factors in the reproductive performance of these females.The aim of chapter 2 was to explore the causes of ovulation failures in these rabbit females. Results showed that non-ovulated females presented lower LH plasma concentration as well as higher body weight and leptin and BOHB II plasma levels than ovulated females. Thus, ovulation failures in females from line R could be attributed to decreased LH plasma concentrations in these females which may be related with their higher body weight and leptin levels.In the light of the previous results, the following three chapters were focused on improvement of the reproductive performance of these females through a different nutritional strategy: a feed-to-appetite diet of these females after the rearing period and prior to insemination. The initial hypothesis was that the females are submitted to a restricted nutritional regimen which is not enough to cope with their needs during reproduction, causing long-term disturbances of energy balance which leads to the subsequent reproductive problems.Chapter 3 aimed to determine if a feed-to-appetite nutritional strategy would affect the hypothalamus-hypophysis axis and the quality of the produced oocytes, by transcriptomic analysis. While no differences were found in the microarray analysis of the hypothalamus-hypophysis, small differences were detected in the transcript expression analysis in oocytes of a group of genes selected. MSY2 was found to be downregulated in oocytes from restricted females. As a key regulator of maternal RNA transcription and translation, changes in this essential gene could explain some of the reproductive problems of these females with high growth potential.Whether the differenc...