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Smoking during pregnancy; [15] cocaine use during pregnancy [16] [17] Women with a large placentae from twins or erythroblastosis are at higher risk. Race is a controversial risk factor, with some studies finding that people from Asia and Africa are at higher risk and others finding no difference.
Risk factors include low-lying placenta, in vitro fertilization. [1] Vasa praevia occurs in about 0.6 per 1,000 pregnancies. [1] The term "vasa previa" is derived from the Latin; "vasa" means vessels and "previa" comes from "pre" meaning "before" and "via" meaning "way". In other words, vessels lie before the fetus in the birth canal and in the ...
An important risk factor for placenta accreta is placenta previa in the presence of a uterine scar. Placenta previa is an independent risk factor for placenta accreta. Additional reported risk factors for placenta accreta include maternal age and multiparity, other prior uterine surgery, prior uterine curettage, uterine irradiation, endometrial ablation, Asherman syndrome, uterine leiomyomata ...
The mum of the UK's largest family is currently 26 weeks pregnant with her 22nd child.
Histopathology of placenta with increased syncytial knotting of chorionic villi, with two knots pointed out. The following characteristics of placentas have been said to be associated with placental insufficiency, however all of them occur in normal healthy placentas and full term healthy births, so none of them can be used to accurately diagnose placental insufficiency: [citation needed]
The team looked at a series of 1,527 single-child pregnancies that ended in miscarriage - here’s what they found
Illustration of fundal height at various points during pregnancy. Some degree of weight gain is expected during pregnancy. The enlarging uterus, growing fetus, placenta, amniotic fluid, normal increase in body fat, and increase in water retention all contribute weight gain during pregnancy. The amount of weight gain can vary from 5 pounds (2.3 ...
Placentas with velamentous cord insertion have a lower vessel density. [2] As the growth of the fetus is dependent on the organization, mass, and nutrient-transfer capacity of the placenta, fetal development is hence hindered in velamentous cord insertion. This can lead to fetal malformations [2] [24] and low birth weight.