Search results
Results from the WOW.Com Content Network
In theory, CPM is when the trisomic cells are found only in the placenta. CPM is detected in approximately 1-2% of ongoing pregnancies that are studied by chorionic villus sampling (CVS) at 10 to 12 weeks of pregnancy. Chorionic villus sampling is a prenatal procedure which involves a placental biopsy.
[2] [6] [10] The umbilical vessels may also be longer compared to normal, [2] particularly when the site of velamentous cord insertion is in the lower uterine section as the extension of the uterine isthmus as pregnancy advances causes vessel elongation. [3] This results in increased vascular resistance, which impedes nutrient transfer to the ...
Anatomy scan image of a human placenta and umbilical cord (colour Doppler rendering) showing central placement of the cord in the placenta and three vessels in the cord, which is the normal physiology. A standard anatomy scan typically includes: [4] Fetal number, including number of amnionic sacs and chorionic sacs for multiple gestations
This genetic abnormality can result in the birth of a normal child who has no obvious disability. [1] It is associated with abnormalities in the growth of the offspring and in the placenta. [ 2 ] Isodisomy may be a common phenomenon in human cells, and "might play a role in the pathogenesis of various nonmalignant disorders and might explain ...
Chorioangioma, or chorangioma, is a benign tumor of placenta. It is a hamartoma-like growth in the placenta consisting of blood vessels, [1] and is seen in approximately 0.5 to 1% pregnancies. [2] It is mostly diagnosed ultrasonically in the second trimester of pregnancy.
Placental abnormalities, such as circumvallate placenta, can harm a developing fetus, as normal exchange of materials between a mother and a developing fetus is impaired. With placental abnormalities, a developing fetus is unable to receive the vital materials that it needs for proper development , resulting in the possibility of pregnancy ...
It is diagnosed by a microscopic examination of the placenta. Commonly used criteria from Altshuler [2] [3] are: "a minimum of 10 villi, each with 10 or more vascular channels, in 10 or more areas of 3 or more random, non-infarcted placental areas when using a ×10 ocular." The Altshuler criteria are not theoretically rigorous, as they do not ...
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 ...