They include: There are families who have such strong sex preferences that they choose to do sex selection.
Using techniques like preimplantation genetic diagnosis (PGD) and Haplotyping (PGH), Shettles, O+12, and other methods of sex selection, they attempt to influence nature.
Since this doesn't look at the baby's anatomy it may be more accurate, where other early method are not as accurate.
Other methods of sex prediction are more accurate but carry more risk to the pregnancy.
These methods can usually be done slightly earlier but are usually only done if other factors are involved that require genetic testing.
The most commonly used methods are amniocentesis and chorionic villus sampling (CVS). They are also much more accurate than ultrasound, with results very close to 100%.
Most practitioners will tell you 100%, but there have been lab errors.
These are most often done in the first trimester or early second trimester.There are many factors that can play a part in whether or not the ultrasound is accurate in predicting the sex of your baby.There is no shortage of people out there telling you non-medical ways to find out the sex of your baby. They are fun to play with, and most of them don't involve anything dangerous.Some of the more common ones involve wedding rings spinning or swaying, the size or shape of your pregnant belly and other questions about pregnancy cravings or bed positioning. The most commonly used method to find out the sex of your baby is ultrasound or sonogram. It is normally done at the fetal anatomy survey or mid-pregnancy ultrasound, done in the mid-second trimester.At this point it is usually easier to tell the sex of the baby.Earlier dates in pregnancy are usually too difficult to tell and later dates become difficult because of crowding in the uterus.