Some prenatal gender tests that use mom’s blood are very accurate at determining baby’s sex, a new study finds. But curious parents-to-be should be wary of online

Skull theory, a method of guessing at an unborn infant’s sex by looking at the shape of its head on ultrasound, is popular online.

In addition to its role in sex determination, the X chromosome is also predicted to become evolutionarily specialised for spermatogenesis.

Aug 09, 2011 · A simple blood test that can determine a baby’s sex as early as seven weeks into pregnancy is highly accurate if used correctly, a finding that experts

The XY sex-determination system is the sex-determination system found in humans, most other mammals, some insects , some snakes, and some plants . In this system, the

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Special FAQ on the gender of the fetus. Over the years the number one question that I have been asked was on the diagnosis of the gender (sex) of the fetus.

15 Surprising Facts about Men and Sex. Think you’re a budding sexpert? While you may be well-versed in female orgasms and sex positions, some of the research

Chorionic villi sampling usually is done beginning in the 10th-12th week of pregnancy. That is still during the 1st trimester when the fetus is quite immature.

cffDNA originates from the trophoblasts making up the placenta. An average of 11%-13.4% of cell-free DNA in maternal blood is of fetal origin, although this varies