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relation between placental volume and fetal weight

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https://www.readbyqxmd.com/read/29281153/microvascular-perfusion-of-the-placenta-developing-fetal-liver-and-lungs-assessed-with-intravoxel-incoherent-motion-imaging
#1
András Jakab, Ruth L Tuura, Raimund Kottke, Nicole Ochsenbein-Kölble, Giancarlo Natalucci, Thi Dao Nguyen, Christian Kellenberger, Ianina Scheer
BACKGROUND: In utero intravoxel incoherent motion magnetic resonance imaging (IVIM-MRI) provides a novel method for examining microvascular perfusion fraction and diffusion in the developing human fetus. PURPOSE: To characterize gestational changes in the microvascular perfusion fraction of the placenta, fetal liver, and lungs using IVIM-MRI. STUDY TYPE: Retrospective, cross-sectional study. SUBJECTS: Fifty-five datasets from 33 singleton pregnancies were acquired (17-36 gestational weeks)...
July 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29207294/placental-structure-and-function-in-different-breeds-in-horses
#2
M Robles, P M Peugnet, S A Valentino, C Dubois, M Dahirel, M-C Aubrière, F Reigner, D Serteyn, L Wimel, A Tarrade, P Chavatte-Palmer
Ponies and sometimes draft horses are often used as experimental models for horses although size and metabolic parameters are known to vary between horse breeds. So far, there is little information about differences of placental structure and no information about differences of placental function between breeds. The aim of this study was to investigate differences in placental size, structure and function at birth in relation to foal size and weight in ponies, Saddlebred and draft horses. Pony, Saddlebred and draft horse pregnancies were obtained by artificial insemination over 2 successive breeding seasons...
March 1, 2018: Theriogenology
https://www.readbyqxmd.com/read/27629830/effect-of-fine-particulate-matter-pm2-5-on-rat-placenta-pathology-and-perinatal-outcomes
#3
Yi Liu, Ledan Wang, Fang Wang, Changzhong Li
BACKGROUND Fine particulate matter with aerodynamic diameters smaller than 2.5 μm (PM2.5) has been reported to cause adverse effects on human health. Evidence has shown the association between PM2.5 exposure and adverse perinatal outcomes, and the most common method is epidemiological investigation. We wished to investigate the impact of PM2.5 on placenta and prenatal outcomes and its related mechanisms in a rat model. MATERIAL AND METHODS Pregnant rats were exposed to a low PM2.5 dose (15 mg/kg) with intratracheal instillation at pregnant day 10 and day 18, while the controls received an equivalent volume normal saline...
September 15, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27624545/circulating-free-soluble-fms-like-tyrosine-kinase-1-during-late-first-trimester-in-relation-with-placental-volume-as-a-surrogate-for-trophoblastic-production-a-physiology-study-in-low-risk-cohort
#4
Sudtawin Manthati, Busadee Pratumvinit, Ratchaneekorn Hanyongyuth, Suthipol Udompunthurak, Amprapha Phaophan, Tuangsit Wataganara
BACKGROUND: Data on first-trimester circulating soluble fms-like tyrosine kinase-1 (sFlt-1) and ischemic placental disease is limited and conflicting. This study aimed to study its physiology in relation to trophoblastic mass as the source of production. METHODS: Low-risk (representing normal placentation) women from 11 0/7 to 13 6/7 weeks' gestation were prospectively enrolled. Selective measurement of serum free sFlt-1 using a new automated assay from 100 eligible subjects was analyzed with gestational age, maternal weight, fetal crown-rump length (CRL), and mean uterine artery Doppler pulsatility index (PI)...
August 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/26428488/functional-imaging-of-the-human-placenta-with-magnetic-resonance
#5
REVIEW
Nathalie Siauve, Gihad E Chalouhi, Benjamin Deloison, Marianne Alison, Olivier Clement, Yves Ville, Laurent J Salomon
Abnormal placentation is responsible for most failures in pregnancy; however, an understanding of placental functions remains largely concealed from noninvasive, in vivo investigations. Magnetic resonance imaging (MRI) is safe in pregnancy for magnetic fields of up to 3 Tesla and is being used increasingly to improve the accuracy of prenatal imaging. Functional MRI (fMRI) of the placenta has not yet been validated in a clinical setting, and most data are derived from animal studies. FMRI could be used to further explore placental functions that are related to vascularization, oxygenation, and metabolism in human pregnancies by the use of various enhancement processes...
October 2015: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/26331586/the-impact-of-fetal-and-maternal-physiologic-factors-on-umbilical-cord-blood-quality-as-a-source-of-stem-cells-in-egyptian-population
#6
Abeer Mohamed Abdelrazik, Manal Niazi El Said, Hossam Eldin M Abdelaziz, Haithm Mohannd Badran, Eman Yousief Ali Abd Elal
BACKGROUND: Umbilical cord blood (UCB) has rapidly become a clinically useful alternative stem cell source. Many variables have been used to evaluate a UCB unit and predict transplant outcomes. The objective of this study was to measure the expression of hematopoietic stem cells in UCB and its relation to certain maternal and neonatal physiologic factors to establish optimum criteria for UCB donor selection. STUDY DESIGN AND METHODS: Two hundred UCB units were collected from normal uncomplicated vaginal and cesarean deliveries...
December 2015: Transfusion
https://www.readbyqxmd.com/read/26120838/placental-features-of-late-onset-adverse-pregnancy-outcome
#7
Lucy E Higgins, Nicolas Rey de Castro, Naa Addo, Mark Wareing, Susan L Greenwood, Rebecca L Jones, Colin P Sibley, Edward D Johnstone, Alexander E P Heazell
OBJECTIVE: Currently, no investigations reliably identify placental dysfunction in late pregnancy. To facilitate the development of such investigations we aimed to identify placental features that differ between normal and adverse outcome in late pregnancy in a group of pregnancies with reduced fetal movement. METHODS: Following third trimester presentation with reduced fetal movement (N = 100), placental structure ex vivo was measured. Placental function was then assessed in terms of (i) chorionic plate artery agonist responses and length-tension characteristics using wire myography and (ii) production and release of placentally derived hormones (by quantitative polymerase chain reaction and enzyme linked immunosorbant assay of villous tissue and explant conditioned culture medium)...
2015: PloS One
https://www.readbyqxmd.com/read/25904636/variation-in-maternal-urinary-cortisol-profiles-across-the-peri-conceptional-period-a-longitudinal-description-and-evaluation-of-potential-functions
#8
P A Nepomnaschy, K G Salvante, L Zeng, C Pyles, H Ma, J C Blais, L Wen, C K Barha
STUDY QUESTION: How do women's first morning urinary cortisol levels, a marker of stress axis activity, vary during the peri-conceptional period (the 12 weeks around conception)? SUMMARY ANSWER: First morning urinary cortisol follows an overall increasing trajectory across the peri-conceptional period, interrupted by 2 week-long decreases during the week preceding conception and the fifth week following conception. WHAT IS KNOWN ALREADY: Later gestational stages (i...
June 2015: Human Reproduction
https://www.readbyqxmd.com/read/25796285/arginine-supplementation-between-41-and-146-days-of-pregnancy-reduces-uterine-blood-flow-in-dairy-heifers
#9
C Yunta, K A Vonnahme, B R Mordhost, D M Hallford, C O Lemley, C Parys, A Bach
We hypothesized that arginine (Arg) supplementation during early pregnancy could foster placental vascularization. The objective of this study was to evaluate the effects of Arg supplementation on uterine artery hemodynamics between 40 and 140 days of gestation. At 41 days of gestation, 17 Holstein heifers (448 ± 73.9 kg) were surgically fitted with a catheter in the peritoneal cavity. After surgery, nine heifers received a daily intraperitoneal infusion of 40 mg of Arg/kg of body weight (BW; ARG), whereas the remaining eight heifers received a daily intraperitoneal infusion of saline solution at equivalent volumes as ARG heifers relative to BW (CTRL)...
July 1, 2015: Theriogenology
https://www.readbyqxmd.com/read/25734475/-prognostic-factors-of-perinatal-short-term-outcome-in-severe-placental-insufficiency-using-doppler-sonography-to-assess-end-diastolic-absent-and-reverse-blood-flow-in-umbilical-arteries
#10
I Frauenschuh, J Wirbelauer, S Karl, G Girschick, M Rehn, U Zollner, T Frambach, J Dietl, T Müller
Significant placental insufficiency, indicated by Doppler ultrasound findings of absent or reverse end-diastolic flow velocities (AREDV), is associated with increased morbidity and mortality. Analysis of blood flow in the ductus venosus should assist in early intrauterine recognition of threatened foetuses. 58 high-risk pregnancies with umbilical AREDV were repeatedly examined (n=364). Doppler findings were correlated with neonatal signs of deterioration (ratio of normoblasts to leukocytes, pH, base excess, Apgar score), as well as short-term morbidity [need for intubation, duration of assisted respiration, evidence of respiratory distress syndrome (RDS), bronchopulmonary dysplasia (BPD), necrotising enterocolitis (NEC), intraventricular haemorrhage (IVH grade III+IV)] against the analysis of the blood flow findings (normal or increased pulsitility, absence or reverse end-diastolic flow) in the umbilical arteries (AU), the middle cerebral arteries (ACM) and ductus venosus (DV) relating these to birth weight and the duration of the pregnancy...
February 2015: Zeitschrift Für Geburtshilfe und Neonatologie
https://www.readbyqxmd.com/read/25538929/association-between-fetal-weight-and-amniotic-fluid-index-in-women-of-central-india
#11
Nitin Wadnere, Susmit Kosta, Ravindra Kumar
BACKGROUND: The placenta is important for fetal growth and well-being. Defective placentation and impaired placental circulation may result in anomalies in fetal growth. Placental volume in the second trimester appears to be closely related to the neonatal weight. The association of body weight with urine output has been observed in human neonates. Our goal is to assess the association of the amniotic fluid index (AFI) with the estimated fetal weight (EFW). MATERIALS AND METHODS: Thirteen hundred and ninety-three pregnant women were prospectively studied by means of an ultrasound over a 12-month period...
2014: Advanced Biomedical Research
https://www.readbyqxmd.com/read/25409488/the-alteration-in-placental-volume-and-placental-mean-grey-value-in-growth-restricted-pregnancies-assessed-by-3d-ultrasound-growth-restriction-3d-ultrasonography
#12
B Artunc Ulkumen, H G Pala, Y Uyar, F M Koyuncu, Y Bulbul Baytur
We aimed to evaluate the volumetric and echogenic alterations in placentas between the intrauterine growth restriction (IUGR) and normal pregnancies using three-dimensional ultrasound and virtual organ computer-aided analysis (VOCAL) software. This case-control prospective study consisted of 48 singleton pregnancies complicated by IUGR and 60 healthy singleton pregnancies matched for maternal age, gestational age and parity. Placental volume (PV) and placental volumetric mean grey values (MGV) were evaluated...
2015: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/25277764/ratio-of-cord-to-maternal-serum-pcb-concentrations-in-relation-to-their-congener-specific-physicochemical-properties
#13
Kinga Lancz, Lubica Murínová, Henrieta Patayová, Beata Drobná, Soňa Wimmerová, Eva Sovčíková, Ján Kováč, Dana Farkašová, Irva Hertz-Picciotto, Todd A Jusko, Tomáš Trnovec
The aim was to characterize placental transfer of some congeners of polychlorinated biphenyls (PCBs) and to relate human in utero exposure to these pollutants to their physicochemical properties. We included into the study 1134 births during the period 2002-2003 from two highly PCB contaminated districts in eastern Slovakia. Concentrations of 15 PCB congeners (IUPAC No. 28, 52, 101, 123(+149), 118, 114, 153, 105, 138(+163), 167, 156(+171), 157, 180, 170, and 189) in umbilical cord (C) and maternal serum (M) were determined...
January 2015: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/25010115/the-assessment-of-placental-volume-and-mean-gray-value-in-preeclamptic-placentas-by-using-three-dimensional-ultrasonography
#14
Burcu Artunc Ulkumen, Halil Gursoy Pala, Yildiz Uyar, Faik Mumtaz Koyuncu, Yesim Bulbul Baytur
OBJECTIVES: We aimed to evaluate the placental volume and placental mean gray value in preeclampsia and healthy placentas by using three-dimensional (3D) ultrasonography and Virtual Organ Computer-aided AnaLysis (VOCAL). METHODS: This case-control prospective study consisted of 27 singleton pregnancies complicated by preeclampsia and 54 healthy singleton pregnancies matched for gestational age, maternal age and parity. Placental volume and placental volumetric mean gray values were evaluated...
June 2015: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/24290868/impact-of-cesarean-section-on-placental-transfusion-and-iron-related-hematological-indices-in-term-neonates-a-systematic-review-and-meta-analysis
#15
REVIEW
Y-b Zhou, H-t Li, L-p Zhu, J-m Liu
Evidence suggests that cesarean section is likely associated with a reduced placental transfusion and poor hematological status in neonates. However, clinical studies have reported somewhat inconsistent results. We conducted a systematic review and meta-analysis to examine whether cesarean section affects placental transfusion and iron-related hematological indices. Pubmed, Web of Science, ScienceDirect, and Ovid Databases were searched for relevant studies published before April 9, 2013. Mean differences between cesarean section and vaginal delivery in outcomes of interests (placental residual blood volume; hematocrit level, hemoglobin concentration, and erythrocyte count in cord/peripheral blood) were extracted and pooled using a random effects model...
January 2014: Placenta
https://www.readbyqxmd.com/read/23756051/2d-ultrasound-and-endocrinologic-evaluation-of-placentation-in-early-pregnancy-and-its-relationship-to-fetal-birthweight-in-normal-pregnancies-and-pre-eclampsia
#16
S Suri, S Muttukrishna, E Jauniaux
OBJECTIVES: To study the relationships between 2D ultrasound measurements of placentation and maternal serum (MS) levels of PAPP-A, inhibin A and fβhCG in early pregnancy and subsequent fetal growth in pregnancies with a normal and abnormal outcome. STUDY DESIGN: Prospective population-based cohort study of 301 pregnancies with a normal outcome, 18 with a pregnancy complicated by pre-term delivery (PTD) and 14 with subsequent pre-eclampsia (PE). MAIN OUTCOME MEASURES: Basal placental surface area, placental thickness, ellipsivity and volume; MS PAPP-A and fβhCG at 11-13 + 6 weeks, MS inhibin A at 15-22 weeks and birthweight centile at delivery...
September 2013: Placenta
https://www.readbyqxmd.com/read/23695508/perinatal-outcomes-of-pregnant-women-with-cervical-intraepithelial-neoplasia
#17
Yue He, Yu-Mei Wu, Tong Wang, Fang Song, Yan Wang, Li Zhu
OBJECTIVE: To investigate the perinatal outcomes of pregnant women with cervical intraepithelial neoplasia (CIN). METHOD: The women in this retrospective case-control study were recruited from Beijing Obstetrics and Gynecology Hospital from August 1, 2007 to February 28, 2010. All the cases were 13-32 gestational weeks, who were diagnosed by colposcopy conducted cervical biopsy. A total of 108 cases were followed-up to the day of delivery. RESULTS: (1) Complications of colposcopy conducted cervical biopsy: there were two cases of pregnant women, who suffered cervical local compression after undergoing colposcopy conducted cervical biopsy, as the bleeding could not be stopped, the wound was treated by local suture...
December 2013: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/22539648/the-impact-of-birth-weight-on-peak-lung-function-in-young-adults
#18
Sadasivam Suresh, Abdullah A Mamun, Michael O'Callaghan, Peter D Sly
BACKGROUND: Poor fetal growth rate, as indicated by lower birth weight, is associated with lower respiratory function in childhood; however, findings in adult life remain inconsistent. A birth cohort provides the opportunity to study the association between birth weight and adult respiratory function. METHODS: The present study data are from a longitudinal birth cohort, the Mater-University of Queensland Study of Pregnancy. Prospective data were available from 2,368 young adults who underwent standard spirometry when 21 years old...
December 2012: Chest
https://www.readbyqxmd.com/read/22418960/effect-of-parity-and-fetal-sex-on-placental-and-luteal-hormones-during-early-first-trimester
#19
Ilkka Y Järvelä, Tamara Záčková, Päivi Laitinen, Markku Ryynänen, Aydin Tekay
OBJECTIVE: Earlier studies have shown that maternal hormone secretion during late first or second trimester may be affected by gravidity. We examined the luteoplacental hormone secretion during 5-11 weeks of gestation in relation to gravidity. METHOD: Forty-one naturally conceived pregnancies underwent weekly assessment of serum human chorionic gonadotrophin, progesterone and 17-OH progesterone, estradiol, testosterone, and pregnancy-associated plasma protein A levels...
February 2012: Prenatal Diagnosis
https://www.readbyqxmd.com/read/22206793/associations-among-birth-weight-placental-weight-gestational-period-and-product-quality-indicators-of-umbilical-cord-blood-units
#20
Shu-Hui Wen, Wan-Ling Zhao, Py-Yu Lin, Kuo-Liang Yang
INTRODUCTION: Numbers of CD34+ cell and total nucleated cell (TNC) and cord blood volume are commonly used as indicators for haematopoietic potential of umbilical cord blood (UCB) units. The purpose of this study was to investigate the relationship between donor-related factors and the quality indicators of UCB. METHODS: Obstetric and neonatal clinical laboratory data of a total of 1549 UCB units were obtained from Buddhist Tzu Chi Stem Cells Center (BTCSCC) Cord Blood Bank...
February 2012: Transfusion and Apheresis Science
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