Question: can you tell the gender at 12 weeks on ultrasound?
Answer: It's at that point that the genital tubercle begins to develop into a penis or clitoris. However, it's not until 14 or 15 weeks that you can clearly begin to see the differentiated genitalia. ... At 12 weeks, we may be able to use ultrasound to determine gender based on the angle of the genital tubercle.