Currently, most pregnant women during the whole time of gestation of the baby, are several mandatory ultrasound of the fetus. The main objective of the study is to identify malformations of the fetus and the overall diagnosis of his condition. Additional pleasant bonus during the procedure is to see the sex of the baby.
Already at week 6 embryo development, laid the genitals, but they do not have morphological differences at this time. And only to 11 the week for the boys begins to appear a faint tubercle on the future site of the penis. At this time, the doctor performing the ultrasound diagnosis can already assume the sex of the baby, but the likelihood of error is high enough.
More accurately see the gender of the baby is possible only starting from 15 weeks of fetal development. But at this time, the embryo still has a big enough size, so the umbilical cord wrapped between her legs, fingers or hands may be mistaken for the specialist morphological signs characteristic of the future men, and parents will be misled.
At 18 weeks the sex organs of the baby has already established enough and clearly visible on ultrasound. So if the baby will not pinch the feet and not turn my back to the sensor, there is a high probability that the parents will see who is a boy or a girl, will soon appear in their family.
An interesting fact is that boys are easier to see. During the ultrasound the embryos of the male sex are often spread legs, showing their belonging to a strong half of mankind. Girls, by contrast, most often turn their back and to see the morphological characteristics of the female sex have to do some research.
There are methods of determining the sex of the baby by means of DNA analysis. While experts reveal the presence or absence of y-chromosomes characteristic of men. The probability of error in this case is minimal.
The material for such analysis is amniotic fluid or part of the placenta. A biopsy of the placenta in this case is carried out at 7-10 weeks of gestation, amniotic fluid analysis second trimester.
This procedure is carried out in exceptional cases when, for whatever reason, you need to diagnose fetal genetic abnormalities. For this to be a rather serious statement, because the biopsy may cause miscarriage. The determining the sex of the baby in the study of just such an opportunity.