Description : Nice day, when the doctor finds out by ultrasound that a baby boy will be born, is it only indicative, or is it 100%?
Last Answer : It depends on what stage of pregnancy the sono doctor is doing ... ;-) Ultrasound can pohlavídetermine the sex from about 12 weeks (the later, the higher the probability of correct detection) - ... (prenatal examination, which consists in taking a part of the choria and examining its cells).