Population-Based Placental Weight Ratio Distributions

Macdonald, Erin M.; Koval, John J.; Natale, Renato; Regnault, Timothy; Campbell, Kirsten

doi:10.1155/2014/291846

Cited by 32 publications

(27 citation statements)

References 32 publications

(41 reference statements)

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“…Placentas from normal outcomes in women ≥35 years have increased placental weight and decreased fetal:placental weight ratio compared to women aged 20-30 years (17). Fetal:placental weight ratio is decreased in SGA and FGR pregnancies, which is thought to result from increased placental size in an attempt to increase nutrient transfer to the fetus (18)(19)(20). At a microscopic level, trophoblast proliferation is reduced and the presence of syncytial nuclear aggregates (also termed syncytial knots) in increased (17).…”

Section: Evidence From Basic Science Studies Of Amamentioning

confidence: 99%

Pregnancy outcome in mothers over the age of 35

Heazell

Newman

Lean

et al. 2018

Current Opinion in Obstetrics &Amp; Gynecology

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Purpose of review -The proportion of pregnancies occurring in women ≥35 years of age has increased from 6.2% in 1980 to 22.3% of births in 2016. This review summarises recent epidemiological and basic scientific studies investigating the association between older maternal age and adverse pregnancy outcome(s) and clinical studies which investigate the effects of intervention to reduce adverse events.Recent findings -Women ≥35 years of age have increased risk of maternal and fetal complications in pregnancy including: stillbirth, a small for gestational age baby, preterm birth, pre-eclampsia and maternal death. These risks increase with increasing age. The reasons for this increased risk are incompletely understood, but likely involve ageing of the maternal cardiovascular and endocrine systems which impacts upon placental function. Intervention, by induction of labour (IOL) at 39 weeks gestation does not increase operative deliveries or short-term adverse maternal and neonatal otucomes and would reduce perinatal mortality.Summary -The additional risks of pregnancy should be discussed with women ≥35 years of age; additional fetal surveillance may be required in the antenatal period. The benefits and risks of IOL at 39 weeks' gestation should be discussed with women ≥35 years of age.

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Section: Evidence From Basic Science Studies Of Amamentioning

confidence: 99%

Pregnancy outcome in mothers over the age of 35

Heazell

Newman

Lean

et al. 2018

Current Opinion in Obstetrics &Amp; Gynecology

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“…For example, the F/P distribution chart made by Macdonald et al . consists of both VD as well as CS cases . Applying these nomograms, we investigated the relationship between the PW and F/P and the mode of delivery and found that the PW and F/P in CS cases were smaller than those in VD cases.…”

Section: Discussionmentioning

confidence: 99%

“…The placenta is the sole organ that nourishes the fetus and is closely related to the fetal growth and perinatal outcomes. Several studies have been described the relationships between the fetus/neonate and placental factors, such as placental pathology, placental weight (PW) itself and the fetal/placental weight ratio (F/P) . The F/P is a simple and important parameter that represents the ratio of the fetal/birth weight to PW and has been widely used; however, the association of the F/P and perinatal adverse outcomes remains controversial …”

Section: Introductionmentioning

confidence: 99%

Difference in Z scores of placental weight and fetal/placental weight ratio by mode of delivery

Matsuda¹,

Itoh

Okada

et al. 2019

J of Obstet and Gynaecol

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Aim:The difference of placental weight (PW) and fetal/placental weight ratio (F/P) Z scores by mode of delivery is unclear. To investigate such differences and the actual conditions underlying the imbalance between fetal and placental growth. Methods: The data from Japanese database 2013 were assessed. Light-for-dates (LFD, n = 12 884), appropriate-for-dates (n = 114 464) and heavy-for-dates (n = 13 164) from 140 512 placentas/infants of mothers delivered a singleton infant. Using Z scores of PW and F/P based on the standard curves of a sex-, parity-and gestational-age-specific PW and F/P, the rate of inappropriately heavy placenta according to the mode of delivery (vaginal [VD] vs cesarean [CS]) was investigated. Results: (i) The PW and F/P were heavier and bigger in VD than in CS, in each subgroup. In the LFD groups, the PW Z score in VD was higher than that in CS, whereas the F/P Z score was lower than in VD than that in CS. (ii) Data of single regression analyses between the PW Z score and F/P Z score in VD groups were different from those in CS, especially in LFD infants. (iii) In the LFD subgroups, the rates of inappropriately heavy placenta in VD (n = 7781) and CS (n = 5103) were 0.54% and 0.86%, respectively. Conclusion: Difference in the mode of delivery influenced the PW and F/P, and the rate of inappropriately heavy placenta is associated with mode of delivery among LFD infants. This methodology might give us a clue to search a useful way for identifying the high-risk groups requiring postnatal counseling.

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“…La monitorización estrecha del deterioro fetal determinará el momento óptimo para la extracción. (14).…”

Section: Discussionunclassified

Evolución y aspectos ecográficos del desprendimiento crónico de placenta.

et al. 2017

Rev. chil. obstet. ginecol.

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RESUMENEl desprendimiento crónico de placenta se caracteriza por la aparición de un sangrado venoso crónico intra o retroplacentario que produce la separación paulatina de la misma. Es poco frecuente y se puede presentar en pacientes sin factores de riesgo. La imagen ecográfica plantea diagnóstico diferencial con la corioamnionitis. El pronóstico fetal es malo especialmente si se asocia con oligoamnios. Se presentan cuatro casos caracterizados por imagen ecográfica característica, retraso del crecimiento fetal, alteración del Doppler, y confirmación anatomopatológica.PALABRAS CLAVE: desprendimiento de placenta, retraso del crecimiento intrauterino, oligoamnios. SUMMARYChronic placental abruption is due to intra or retroplacental insidious bleeding that causes progressive separation from the uterine wall. It is a rare condition and can occur in low risk patients. Chronic abruption imaging poses differential diagnosis with infectious TORCH chorioamnionitis. Fetal prognosis is ominous especially in the presence of oligohydramnios. We present four cases with a common ultrasound appearance, fetal growth restriction, Doppler abnormalities and pathological confirmation.

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Population-Based Placental Weight Ratio Distributions

Cited by 32 publications

References 32 publications

Pregnancy outcome in mothers over the age of 35

Pregnancy outcome in mothers over the age of 35

Difference in Z scores of placental weight and fetal/placental weight ratio by mode of delivery

Evolución y aspectos ecográficos del desprendimiento crónico de placenta.

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