We have to Swedes friends that had babies this week. Weeks ago I asked them if it was a boy or a girl and they didn't know.
So my Brazilian friends, you can survive 9 months without knowing the gender of your baby. But I ask myself: If we have the technology for doing that, why don't we do it? If you know the answer, please tell me, because my friends didn't convinced me with their explanations.
If you ask a pregnant woman in Brazil if she will have a boy or a girl, she will know the answer maybe in the forth month.
I'm not judging what is better, just saying, different cultures.