European Journal of Obstetrics & Gynecology and Reproductive Biology
Regular paperThe effect of short-term heat stress on uterine contractility, fetal heart rate and fetal movements at late pregnancy
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Ambient temperature, heat stress and fetal growth: A review of placenta-mediated mechanisms
2023, Molecular and Cellular EndocrinologyEmbryonic heart rate correlates with maternal temperature and developmental stage in viviparous snakes
2021, Comparative Biochemistry and Physiology -Part A : Molecular and Integrative PhysiologyCitation Excerpt :But while some challenges may accompany ultrasonography with adult animals, it remains a promising method for field studies of embryonic heart rate as a source of valuable, relatively non-invasive information on developmental and cardiovascular systems. As in oviparous species, embryonic heart rates for viviparous species, such as humans, can be affected by the physiological and psychological state of the mother throughout development (Morishima et al., 1975; Vähä-Eskeli and Erkkola, 1991; O'Neill, 1996; Rafla and Cook, 1999; Yung et al., 2008; Ivanov et al., 2009; May et al., 2010; Dimasuay et al., 2016). However, to our knowledge no previously published study has focused on the embryonic heart rates of viviparous reptiles, and their relationship to maternal physiology.
Associations of maternal ambient temperature exposures during pregnancy with the risk of preterm birth and the effect modification of birth order during the new baby boom: A birth cohort study in Guangzhou, China
2020, International Journal of Hygiene and Environmental HealthHeat and pregnancy-related emergencies: Risk of placental abruption during hot weather
2018, Environment InternationalCitation Excerpt :Heat may alter placental blood flow patterns, potentially reducing the integrity of the placenta and increasing the chance of abruption. Also, elevated temperatures have been shown to increase fetal heart rate and lead to uterine contractions (Vaha-Eskeli and Erkkola, 1991), both of which are associated with placental abruption (Tikkanen, 2011). Heat could further affect risk factors for abruption, such as preeclampsia and prolonged preterm premature rupture of membranes (Beltran et al., 2014; Yackerson et al., 2007).
Heat and air pollution exposure as triggers of delivery: A survival analysis of population-based pregnancy cohorts in Rome and Barcelona
2016, Environment InternationalCitation Excerpt :Even if research in this field is recent, a considerable number of studies and some very recent reviews (Basu et al., 2010; Beltran et al., 2014; Schifano et al., 2013; Dadvand et al., 2011; Strand et al., 2012) seem to confirm an effect of heat on the probability of being born preterm. Previous studies on potential biological mechanisms seem to support the observed effects, as it has been shown that heat stress can lead to uterine contractions in pregnant women (Khamis et al., 1983; Vähä-Eskeli and Erkkola, 1991). The secretion of oxytocin and prostaglandin (PGF2α), which are known to induce labor in humans (Kelly and Tan, 2001; Kelly et al., 2009; Lee et al., 2009), has been shown to be increased under heat stress conditions in animal studies (Dreiling et al., 1991; De Rensis and Scaramuzzi, 2003; Wolfenson et al., 1993).
High environmental temperature and preterm birth: A review of the evidence
2014, MidwiferyCitation Excerpt :These authors suggest that maternal heat stress may trigger a release of hormones such as cortisol, which may in turn induce labour. Earlier studies support this link between heat stress and increased uterine contractions in both humans (Vaha-Eskeli and Erkkola, 1990) and in animals (Dreiling et al., 1991). Increased contractions are thought to result from increased secretion of oxytocins and prostaglandin, during heat stress (Dreiling et al., 1991).