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Relationship Between Placental Location and Fetal Gender
Can Placental / Chorionic villi Location be used as Indicator for Fetal
at Six Weeks Gestation using 2-D and Color Flow Sonography?
Material and Method
This is a multi-center prospective cohort study of 5376 pregnant women
underwent ultrasonography from 1997 to 2007. Trans-vaginal sonograms
performed in 22% of the patients at 6 weeks gestation, and
sonograms were used at 18-20 weeks gestation, at this time the fetal
confirmed in 98-99%. The fetal sex was confirmed 100% after delivery.
also addressed the bicornuate uteri with single pregnancy in relation to
placenta / chorionic villi location. The result was tabulated according
gender and placenta / chorionic villi location. Bicornuate uteri with
fetus in different horns were studied and tabulated
Dramatic differences were detected in chorionic villi / placental
according to gender. 97.2% of the male fetuses had a chorionic
location on the right side of the uterus whereas, 2.4% had a chorionic
location to the left of the uterus. On the other hand 97.5% of female
had a chorionic villi/placenta location to the left of the uterus
had their chorionic villi/placenta location to the right side of the
cases were found to involve bicornuate uteri with single foetuses, most
fetuses were located in the right horn of the uterus and showed right
laterality (70%). Most female fetuses 59% on the other hand, were
located in the
left horn and showed left laterality (59%).Moreover, most of the males
in the left horn exhibited right laterality (89%). Also most females
right horn exhibited left laterality (976.4%). In addition this research
indicated that there was a possible link between renal pyelectasis and
location, and it might be used as a genetic soft marker.
Ramzi’s method is using placenta /chorionic villi location as a
fetal gender detection at 6 weeks gestation was found to be highly
This method correctly predicts the fetus gender in 97.2% of males and
females early in the first trimester. And it might be helpful to use as a
genetic soft marker in relation with fetal pyelectasis.
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