scholarly journals eNOS knockout mouse as a model of fetal growth restriction with an impaired uterine artery function and placental transport phenotype

2012 ◽  
Vol 303 (1) ◽  
pp. R86-R93 ◽  
Author(s):  
Laura C. Kusinski ◽  
Joanna L. Stanley ◽  
Mark R. Dilworth ◽  
Cassandra J. Hirt ◽  
Irene J. Andersson ◽  
...  
Keyword(s):  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Vascular Function ◽  
Uterine Artery ◽  
Nutrient Transport ◽  
Growth Restriction ◽  
Growth Potential ◽  
Abdominal Circumference ◽  
Maternal Undernutrition ◽  
Endothelial Nitric Oxide

Fetal growth restriction (FGR) is the inability of a fetus to reach its genetically predetermined growth potential. In the absence of a genetic anomaly or maternal undernutrition, FGR is attributable to “placental insufficiency”: inappropriate maternal/fetal blood flow, reduced nutrient transport or morphological abnormalities of the placenta (e.g., altered barrier thickness). It is not known whether these diverse factors act singly, or in combination, having additive effects that may lead to greater FGR severity. We suggest that multiplicity of such dysfunction might underlie the diverse FGR phenotypes seen in humans. Pregnant endothelial nitric oxide synthase knockout (eNOS−/−) dams exhibit dysregulated vascular adaptations to pregnancy, and eNOS−/− fetuses of such dams display FGR. We investigated the hypothesis that both altered vascular function and placental nutrient transport contribute to the FGR phenotype. eNOS−/− dams were hypertensive prior to and during pregnancy and at embryonic day (E) 18.5 were proteinuric. Isolated uterine artery constriction was significantly increased, and endothelium-dependent relaxation significantly reduced, compared with wild-type (WT) mice. eNOS−/− fetal weight and abdominal circumference were significantly reduced compared with WT. Unidirectional maternofetal 14C-methylaminoisobutyric acid (MeAIB) clearance and sodium-dependent 14C-MeAIB uptake into mouse placental vesicles were both significantly lower in eNOS−/− fetuses, indicating diminished placental nutrient transport. eNOS−/− mouse placentas demonstrated increased hypoxia at E17.5, with elevated superoxide compared with WT. We propose that aberrant uterine artery reactivity in eNOS−/− mice promotes placental hypoxia with free radical formation, reducing placental nutrient transport capacity and fetal growth. We further postulate that this mouse model demonstrates “uteroplacental hypoxia,” providing a new framework for understanding the etiology of FGR in human pregnancy.

INTRAUTERINE GROWTH RETARDATION - A REVIEW ARTICLE

2018 ◽  
pp. 184-195
Author(s):  
Minh Son Pham ◽  
Vu Quoc Huy Nguyen ◽  
Dinh Vinh Tran
Keyword(s):  
Fetal Growth ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Fetal Growth Restriction ◽  
Growth Restriction ◽  
Growth Potential ◽  
National Guidelines ◽  
Intrauterine Growth ◽  
No Gold Standard

Small for gestational age (SGA) and fetal growth restriction (FGR) is difficult to define exactly. In this pregnancy condition, the fetus does not reach its biological growth potential as a consequence of impaired placental function, which may be because of a variety of factors. Fetuses with FGR are at risk for perinatal morbidity and mortality, and poor long-term health outcomes, such as impaired neurological and cognitive development, and cardiovascular and endocrine diseases in adulthood. At present no gold standard for the diagnosis of SGA/FGR exists. The first aim of this review is to: summarize areas of consensus and controversy between recently published national guidelines on small for gestational age or fetal growth restriction; highlight any recent evidence that should be incorporated into existing guidelines. Another aim to summary a number of interventions which are being developed or coming through to clinical trial in an attempt to improve fetal growth in placental insufficiency. Key words: fetal growth restriction (FGR), Small for gestational age (SGA)

DIAGNOSIS AND MANAGEMENT OF SELECTIVE FETAL GROWTH RESTRICTION IN MONOCHORIONIC TWINS

2009 ◽  
Vol 20 (4) ◽  
pp. 269-281 ◽  
Author(s):  
EDUARD GRATACÓS ◽  
ELISENDA EIXARCH ◽  
FATIMA CRISPI
Keyword(s):  
Fetal Growth ◽  
Common Sense ◽  
Fetal Growth Restriction ◽  
Growth Restriction ◽  
Fetal Weight ◽  
Abdominal Circumference ◽  
Monochorionic Twins ◽  
Normal Ranges ◽  
Estimated Fetal Weight ◽  
Simple Definition

Selective fetal growth restriction (sFGR) has been reported to occur in about 10–15% of monochorionic (MC) twins. The diagnosis of sFGR has been based on variable criteria including estimated fetal weight (EFW), abdominal circumference and/or the degree of fetal weight discordance. Recent studies tend to use a simple definition which includes the presence of an EFW less than the 10th percentile in the smaller twin. Some would argue that the intertwin fetal weight discordance should be included in the definition. Indeed this factor plays a major role in the complications presented by these cases. While the majority of cases with one fetus below the 10th percentile usually will also present with a large intertwin EFW discordance, the contrary is not always true. Thus, it is possible to find MC twins with remarkable intertwin EFW discordance but the EFW of both fetuses are still within normal ranges. Although it appears to be common sense that a large intertwin discrepancy might represent a higher risk for some of the complications described later in this review, there is no consistent evidence to support this notion. Therefore, due to its simplicity, a definition based on an EFW below 10th percentile in one twin is probably the most useful for clinical and research purposes.

Identification of newborns with Fetal Growth Restriction (FGR) in weight and/or length based on constitutional growth potential

2006 ◽  
Vol 165 (10) ◽  
pp. 717-725 ◽  
Author(s):  
Nicole Mamelle ◽  
Magali Boniol ◽  
Olivier Rivière ◽  
Marie O. Joly ◽  
Georges Mellier ◽  
...  
Keyword(s):  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Growth Restriction ◽  
Growth Potential

Development of Structures and Transport Functions in the Mouse Placenta

Physiology ◽  
2005 ◽  
Vol 20 (3) ◽  
pp. 180-193 ◽  
Author(s):  
Erica D. Watson ◽  
James C. Cross
Keyword(s):  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Cell Biology ◽  
Fetal Death ◽  
Nutrient Transport ◽  
Growth Restriction ◽  
Molecular Pathways ◽  
Placental Development ◽  
Mouse Mutants ◽  
Mouse Placenta

The placenta is essential for sustaining the growth of the fetus during gestation, and defects in its function result in fetal growth restriction or, if more severe, fetal death. Several molecular pathways have been identified that are essential for development of the placenta, and mouse mutants offer new insights into the cell biology of placental development and physiology of nutrient transport.

Definition of Fetal Growth Restriction According to Constitutional Growth Potential

Neonatology ◽  
2001 ◽  
Vol 80 (4) ◽  
pp. 277-285 ◽  
Author(s):  
N. Mamelle ◽  
V. Cochet ◽  
O. Claris
Keyword(s):  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Growth Restriction ◽  
Growth Potential ◽  
Definition Of

scholarly journals Early-onset fetal growth restriction defined by only abdominal circumference is associated with perinatal mortality

2022 ◽  
Vol 226 (1) ◽  
pp. S165
Author(s):  
James D. Toppin ◽  
Miranda Long ◽  
Rick Tivis ◽  
Joseph Biggio ◽  
Frank Williams
Keyword(s):  
Perinatal Mortality ◽  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Early Onset ◽  
Growth Restriction ◽  
Abdominal Circumference

scholarly journals Fetal growth restriction defined by abdominal circumference alone predicts perinatal mortality

2022 ◽  
Vol 226 (1) ◽  
pp. S179
Author(s):  
Miranda Long ◽  
Angela Nakahara ◽  
Ardem Elmayan ◽  
Rick Tivis ◽  
Joseph Biggio ◽  
...  
Keyword(s):  
Perinatal Mortality ◽  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Growth Restriction ◽  
Abdominal Circumference

Fetal growth restriction: unresolved issues of risk stratification, early diagnosis, and obstetric management

2021 ◽  
Vol 20 (5) ◽  
pp. 76-86
Author(s):  
N.M. Podzolkova ◽  
◽  
Yu.V. Denisova ◽  
M.Yu. Skvortsova ◽  
T.V. Denisova ◽  
...  
Keyword(s):  
Early Diagnosis ◽  
Risk Stratification ◽  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Growth Restriction ◽  
Diagnostic Methods ◽  
Growth Potential ◽  
Increased Risk ◽  
Obstetric Management ◽  
Language Literature

Fetal growth restriction (FGR) refers to pregnancy complications associated with an increased risk of perinatal morbidity and mortality and is defined in the Russian-language literature as the fetal size and weight retardation in relation to the norm for a given gestational age, and in the English-language literature – as the inability of the fetus to realize its genetically determined growth potential. FGR is the cause of 43% of stillbirths of unspecified etiology, and some cases remain undiagnosed even in high-risk populations due to the lack of universal diagnostic standards for this pathology. The review presents a critical analysis of the existing definitions of FGR, the latest data on risk factors, an assessment of diagnostic methods for its early and late forms, the prospects of using biomarkers and instrumental methods of examination in predicting adverse perinatal outcomes, and an algorithm for the management of pregnancy complicated by FGR. For a more complete coverage of the literature and deeper understanding of the nosology, attention is focused on FGR that is not accompanied by preeclampsia and other hypertensive disorders, which occur in about 30% of cases. Key words: placental insufficiency, fetometry, percentile, pulsatility index, fetal growth restriction For citation: Podzolkova N.M., Denisova Yu.V., Skvortsova M.Yu., Denisova T.V., Shovgenova D.S. Fetal growth restriction: unresolved issues of risk stratification, early diagnosis, and obstetric management. Vopr. ginekol. akus. perinatol. (Gynecology, Obstetrics and Perinatology). 2021; 20(5): 76–86. (In Russian). DOI: 10.20953/1726-1678-2021-5-76-86

scholarly journals 977: Fetal growth restriction: First trimester abnormal analytes, second trimester uterine artery - complementary or redundant?

2020 ◽  
Vol 222 (1) ◽  
pp. S606-S607
Author(s):  
Sara Jones ◽  
Amir Aviram ◽  
Ludmila Porto ◽  
Tianhua Huang ◽  
Jon Barrett ◽  
...  
Keyword(s):  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Uterine Artery ◽  
First Trimester ◽  
Growth Restriction ◽  
Second Trimester

Fetal growth restriction: First trimester abnormal analytes, second trimester uterine artery—complementary or redundant?

2020 ◽  
Vol 42 (5) ◽  
pp. 677
Author(s):  
Sara Jones ◽  
Amir Aviram ◽  
Ludmila Porto ◽  
Tianhua Huang ◽  
Jon Barrett ◽  
...  
Keyword(s):  
Fetal Growth ◽  
Fetal Growth Restriction ◽  
Uterine Artery ◽  
First Trimester ◽  
Growth Restriction ◽  
Second Trimester
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