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Normal physiologic birth

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https://www.readbyqxmd.com/read/29105382/hypoxia-from-placental-development-to-fetal-programming
#1
REVIEW
Lais Fajersztajn, Mariana Matera Veras
Hypoxia may influence normal and different pathological processes. Low oxygenation activates a variety of responses, many of them regulated by hypoxia-inducible factor 1 complex, which is mostly involved in cellular control of O2 consumption and delivery, inhibition of growth and development, and promotion of anaerobic metabolism. Hypoxia plays a significant physiological role in fetal development; it is involved in different embryonic processes, for example, placentation, angiogenesis, and hematopoiesis. More recently, fetal hypoxia has been associated directly or indirectly with fetal programming of heart, brain, and kidney function and metabolism in adulthood...
October 16, 2017: Birth defects research
https://www.readbyqxmd.com/read/29055243/physiological-vital-sign-ranges-in-newborns-from-34-weeks-gestation-a-systematic-review
#2
REVIEW
Michelle Paliwoda, Karen New, Mark Davies, Fiona Bogossian
CONTEXT: The birth process and the moments thereafter are a crucial time for newborns as they adapt to extra uterine life. The adaptive process begins immediately and can take a number of days to complete. The process involves initiating and maintaining respirations, thermoregulation, and the change from foetal circulation to newborn circulation. The majority of newborns successfully adapt to extra uterine life, some experience difficulty. Early warning tools may assist clinicians identify early signs of failure to adapt and/or deterioration but these are dependent on 'Normal' vital sign reference ranges for triggering an escalation of care...
October 9, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/29037224/maternal-and-fetal-blood-lipid-concentrations-during-pregnancy-differ-by-maternal-body-mass-index-findings-from-the-rolo-study
#3
Aisling A Geraghty, Goiuri Alberdi, Elizabeth J O'Sullivan, Eileen C O'Brien, Brenda Crosbie, Patrick J Twomey, Fionnuala M McAuliffe
BACKGROUND: Pregnancy is a time of altered metabolic functioning and maternal blood lipid profiles change to accommodate the developing fetus. While these changes are physiologically necessary, blood lipids concentrations have been associated with adverse pregnancy outcomes such as gestational diabetes, pregnancy-induced hypertension and high birth weight. As blood lipids are not routinely measured during pregnancy, there is limited information on what is considered normal during pregnancy and in fetal blood...
October 16, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28960148/perinatal-lethality-of-par4-mice-delivered-by-primiparous-dams-reveals-spontaneous-bleeding-in-mice-without-platelet-thrombin-receptor-function
#4
Shauna L French, Justin R Hamilton
Protease-activated receptor 4 (PAR4) is a cell surface G protein-coupled receptor for serine proteases, such as thrombin. Par4(-/-) mice have platelets that are unresponsive to thrombin and thereby allow examination of the importance of thrombin-induced platelet activation in (patho)physiology. Par4(-/-) mice are protected against arterial thrombosis but show no evidence of spontaneous bleeding. This contrasts with the bleeding experienced by mice with marked thrombocytopenia, such as those with genetic deficiency of the transcription factor, nuclear factor erythroid 2 (Nfe2(-/-)), that have high rates of perinatal death due to hemorrhage...
September 29, 2017: Platelets
https://www.readbyqxmd.com/read/28914501/andrology-of-male-to-female-transsexuals-influence-of-cross-sex-hormone-therapy-on-testicular-function
#5
REVIEW
F Schneider, S Kliesch, S Schlatt, N Neuhaus
Patients with gender dysphoria are offered cross-sex hormone therapy and sex reassignment surgery to achieve the transition between the sex assigned at birth and gender identity. According to international guidelines, cross-sex hormone therapy in trans-women should lead to a psychologically and physiologically healthy body with feminized serum hormone levels, resulting in suppression of spermatogenesis. However, in a recently published multi-center study, we discovered a high proportion of patients with male serum hormone levels and qualitatively intact spermatogenesis on the day of sex reassignment surgery...
September 2017: Andrology
https://www.readbyqxmd.com/read/28911179/deciphering-the-function-of-the-blunt-circadian-rhythm-of-melatonin-in-the-newborn-lamb-impact-on-adrenal-and-heart
#6
Maria Seron-Ferre, Claudia Torres-Farfan, Francisco J Valenzuela, Sebastian Castillo-Galan, Auristela Rojas, Natalia Mendez, Henry Reynolds, Guillermo J Valenzuela, Anibal J Llanos
Neonatal lambs, as with human and other neonates, have low arrhythmic endogenous levels of melatonin for several weeks until they start their own pineal rhythm of melatonin production at approximately 2 weeks of life. During pregnancy, daily rhythmic transfer of maternal melatonin to the fetus has important physiological roles in sheep, nonhuman primates, and rats. This melatonin rhythm provides a circadian signal and also participates in adjusting the physiology of several organs in preparation for extrauterine life...
September 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28903776/facilitatory-effect-of-insulin-treatment-on-hepatocellular-carcinoma-development-in-diabetes
#7
Hayato Baba, Makoto Kurano, Takeshi Nishida, Hideki Hatta, Ryoji Hokao, Koichi Tsuneyama
BACKGROUND: To evaluate the effect of insulin treatment on the incidence and/or severity of hepatocellular carcinoma (HCC) in a mouse model of HCC based on diabetes. METHODS: We recently reported that neonatal streptozotocin (STZ) treatment causes type 1 diabetes and subsequent HCC in ddY, Institute for Animal Reproduction (DIAR) mice. Newborn male DIAR mice were divided into three groups based on STZ and insulin (INS) treatment. STZ was subcutaneously injected (60 mg/g) into the STZ-treated group (DIAR-nSTZ mice, N = 13) and the STZ/insulin-treated group (DIAR-nSTZ/INS mice, N = 20)...
September 13, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28900802/assessment-of-m2-anxa5-haplotype-as-a-risk-factor-in-couples-with-placenta-mediated-pregnancy-complications
#8
Nina Rogenhofer, Lara R M Nienaber, Lea C Amshoff, Nadia Bogdanova, David Petroff, Peter Wieacker, Christian J Thaler, Arseni Markoff
PURPOSE: The aim of this study was to confirm the associated M2/ANXA5 carrier risk in women with placenta-mediated pregnancy complications (PMPC) and to test their male partners for such association. Further analysis evaluated the influence of maternal vs. paternal M2 alleles on miscarriage. METHODS: Two hundred eighty-eight couples with preeclampsia (PE), intrauterine growth restriction (IUGR), or premature birth (PB) were recruited (n = 96 of each phenotype)...
September 13, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28889657/the-physiologic-pattern-of-normal-labor-progression
#9
Jun Zhang, Tao Duan
The escalating frequency of obstetric interventions such as oxytocin augmentation and cesarean delivery has raised concerns to practitioners and the public. While maternal consequences of cesarean section are well recognized by obstetricians, the impact of cesarean birth on child health has come under the spot light in recent years. Mounting evidence is linking cesarean birth with childhood allergic disorders, such as asthma, childhood obesity and neurodevelopmental disorders (Cho CE, et al. Am J Obstet Gynecol 2013;208:249-54...
September 10, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28887018/dpp9-enzyme-activity-controls-survival-of-mouse-migratory-tongue-muscle-progenitors-and-its-absence-leads-to-neonatal-lethality-due-to-suckling-defect
#10
Munkyung Kim, Maryline Minoux, Alessandro Piaia, Benjamin Kueng, Berangere Gapp, Delphine Weber, Corinne Haller, Samuel Barbieri, Kenji Namoto, Thorsten Lorenz, Johann Wirsching, Frederic Bassilana, William Dietrich, Filippo M Rijli, Iwona Ksiazek
Dipeptidyl peptidase 9 (DPP9) is an intracellular N-terminal post-proline-cleaving enzyme whose physiological function remains largely unknown. We investigated the role of DPP9 enzyme in vivo by characterizing knock-in mice expressing a catalytically inactive mutant form of DPP9 (S729A; DPP9(ki/ki) mice). We show that DPP9(ki/ki) mice die within 12-18h after birth. The neonatal lethality can be rescued by manual feeding, indicating that a suckling defect is the primary cause of neonatal lethality. The suckling defect results from microglossia, and is characterized by abnormal formation of intrinsic muscles at the distal tongue...
November 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28770443/how-to-proceed-with-examination-of-a-child
#11
REVIEW
Sonia Makhija, Poornima Tiwari
The assessment of a child is quite different from that of adults and requires knowledge of normal variations in anatomy and physiology with growth and development. An important part of initial assessment includes triage and recognizing children with emergency signs so that they can be managed at the earliest to prevent death and referred timely to the specialist. After ruling out emergency signs, the children with priority signs require prompt assessment, management and referral to the specialist. In addition to normal history as in adults, prenatal and birth history, developmental history, immunization history, feeding history and social history are important for complete assessment of the child...
August 3, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28759177/breastfeeding-outcomes-after-oxytocin-use-during-childbirth-an-integrative-review
#12
REVIEW
Elise N Erickson, Cathy L Emeis
INTRODUCTION: Despite widespread use of exogenous synthetic oxytocin during the birth process, few studies have examined the effect of this drug on breastfeeding. Based on neuroscience research, endogenous oxytocin may be altered or manipulated by exogenous administration or by blocking normal function of the hormone or receptor. Women commonly cite insufficient milk production as their reason for early supplementation, jeopardizing breastfeeding goals. Researchers need to consider the role of birth-related medications and interventions on the production of milk...
July 2017: Journal of Midwifery & Women's Health
https://www.readbyqxmd.com/read/28731586/pregnancy-in-women-with-nonclassic-congenital-adrenal-hyperplasia-time-to-conceive-and-outcome
#13
Ori Eyal, Irit Ayalon-Dangur, Anat Segev-Becker, Anita Schachter-Davidov, Shoshana Israel, Naomi Weintrob
OBJECTIVE: Nonclassic congenital adrenal hyperplasia (NCAH) is common among Ashkenazi Jews (1:400). It is associated with various degrees of postnatal virilization, irregular menses and infertility. Therapy of symptomatic subjects consists of physiologic doses of glucocorticoids. The objective of this study was to evaluate the effect of glucocorticoid treatment on fertility and on pregnancy outcome in women with NCAH. DESIGN, SETTING AND PATIENTS: This retrospective study included 75 women diagnosed with NCAH who were followed in our clinic and sought fertility between 2008 and 2015...
November 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28727004/physiology-and-endocrinology-symposium-postnatal-reproductive-development-and-the-lactocrine-hypothesis
#14
F F Bartol, A A Wiley, A F George, D J Miller, C A Bagnell
Maternal effects on development can program cell fate and dictate offspring phenotype. Such effects do not end at birth, but extend into postnatal life through signals communicated from mother to offspring in first milk (colostrum). Transmission of bioactive factors from mother to offspring as a specific consequence of nursing defines a lactocrine mechanism. The female reproductive tract is not fully formed at birth (postnatal day = PND 0). Data for ungulates and mice indicate that disruption of development during neonatal life can have lasting effects on the form and function of uterine tissues...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28708527/artificially-extended-photoperiod-administered-to-pre-partum-mares-via-blue-light-to-a-single-eye-observations-on-gestation-length-foal-birth-weight-and-foal-hair-coat-at-birth
#15
Margaret B Nolan, Caroline M Walsh, Noelle Duff, Conor McCrarren, Ralph L Prendergast, Barbara A Murphy
In seasonally breeding animals, photoperiod perception is crucial for timing of important physiological events. In the horse, long day photoperiod influences the onset of ovulation and cyclicity, shedding of the heavier winter coat and the timing of parturition. In this compilation of studies, conducted across three breeding seasons and two countries, the impact of artificially extended day length was investigated on gestation length, foal birth weight and foal hair coat at birth. The light therapy was administered to pre-partum mares via mobile head worn masks which provided short wavelength blue light to a single eye...
September 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28701011/action-plan-for-prolongation-of-nephrogenesis-in-preterm-and-growth-restricted-babies-explore-ultrastructure-of-the-nephrogenic-zone-identify-a-molecular-target-select-a-viable-drug-and-find-a-path-for-administration
#16
Will W Minuth
A large amount of investigations informs about primary steps of mammalian kidney development such as anlage of the organ and initial nephron formation, while only few data exists about the late phase of human kidney development. In particular, little attention was up to date addressed to the decrease of morphogenic activity in the nephrogenic zone short before birth and the vanishing of all stem cell niches aligned beyond the organ capsule. There is evidence that molecular controlling of this normal but degenerative developmental process also plays a decisive role in the kidneys of preterm and growth restricted babies...
July 12, 2017: Drug Research
https://www.readbyqxmd.com/read/28695270/maternal-use-of-prednisolone-is-unlikely-to-be-associated-with-neonatal-adrenal-suppression-a-single-center-study-of-16-cases
#17
Leanne de Vetten, Margriet van Stuijvenberg, Ido P Kema, Gianni Bocca
The use of supra-physiological, exogenous corticosteroids in pregnancy may lead to neonatal adrenal suppression. We report on a single-center, case series study carried out between 2006 and 2014, which included all newborns (n = 16) of mothers using prednisolone ≥10 mg/day during pregnancy. Newborns were routinely assessed according to hospital protocol, with follow-up until 6 weeks after birth. We investigated the clinical symptoms and biochemical findings of adrenal suppression occurring in the newborns...
August 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28674490/what-the-spectrum-of-microglial-functions-can-teach-us-about-fetal-alcohol-spectrum-disorder
#18
REVIEW
Elissa L Wong, Rianne D Stowell, Ania K Majewska
Alcohol exposure during gestation can lead to severe defects in brain development and lifelong physical, behavioral and learning deficits that are classified under the umbrella term fetal alcohol spectrum disorder (FASD). Sadly, FASD is diagnosed at an alarmingly high rate, affecting 2%-5% of live births in the United States, making it the most common non-heritable cause of mental disability. Currently, no standard therapies exist that are effective at battling FASD symptoms, highlighting a pressing need to better understand the underlying mechanisms by which alcohol affects the developing brain...
2017: Frontiers in Synaptic Neuroscience
https://www.readbyqxmd.com/read/28662821/the-role-of-matrix-metalloproteinases-in-development-repair-and-destruction-of-the-lungs
#19
Amanda Y Hendrix, Farrah Kheradmand
Normal gas exchange after birth requires functional lung alveolar units that are lined with epithelial cells, parts of which are intricately fused with microvascular capillaries. A significant phase of alveolar lung development occurs in the perinatal period, continues throughout early stages in life, and requires activation of matrix-remodeling enzymes. Failure to achieve an optimum number of alveoli during lung maturation can cause several untoward medical consequences including disabling obstructive and/or restrictive lung diseases that limit physiological endurance and increase mortality...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28644347/age-and-sex-normalization-of-intestinal-permeability-measures-for-the-improved-assessment-of-enteropathy-in-infancy-and-early-childhood-results-from-the-mal-ed-study
#20
Margaret N Kosek, Gwenyth O Lee, Richard L Guerrant, Rashidul Haque, Gagandeep Kang, Tahmeed Ahmed, Pascal Bessong, Asad Ali, Estomih Mduma, Pablo Peñataro Yori, William A Faubion, Aldo A M Lima, Maribel Paredes Olortegui, Carl Mason, Sudhir Babji, Ravinder Singh, Shahida Qureshi, Peter S Kosek, Amidou Samie, John Pascal, Sanjaya Shrestha, Benjamin J J McCormick, Jessica C Seidman, Dennis R Lang, Anita Zaidi, Laura E Caulfield, Michael Gottlieb
OBJECTIVES: The aim of the study was to describe changes in intestinal permeability in early childhood in diverse epidemiologic settings. METHODS: In a birth cohort study, the lactulose:mannitol (L:M) test was administered to 1980 children at 4 time points in the first 24 months of life in 8 countries. Data from the Brazil site with an incidence of diarrhea similar to that seen in the United States and no growth faltering was used as an internal study reference to derive age- and sex-specific z scores for mannitol and lactulose recoveries and the L:M ratio...
July 2017: Journal of Pediatric Gastroenterology and Nutrition
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