Nerve cells are the primary cells in the nervous system. They are responsible for relaying electrical messages to cells and tissues in other organ systems. This article discusses the functions and structures of nerve cells in the human body.
Now, of course, there are much more accurate ways to determine gender before a baby is born. If you're at least 12 weeks pregnant, your doctor can probably tell you the sex of your baby with a high degree of confidence. That is, if you really want to know. Parents who want to pick out a name or stock up on baby clothes before the big day often look forward to their ultrasound appointment.
CVS is carried out earlier in pregnancy, between about 11 weeks and 14 weeks. It is similarly only used to determine a baby's sex when there is likely to be a serious gender-related problem.