Boy fetus shows sex organ clearly on ultrasound, although he is only 11 weeks (2.5 months). Error?

Fetal gender determination on ultrasound can be possible as early as ten weeks in the womb, especially for boys, if the penis can clearly be seen as shown here.
_______
Hi;
I am Dr. Kağan Kocatepe, an OBGYN doctor from Istanbul. In this new video channel I will be talking about all aspects of pregnancy, labor and delivery and of course of postpartum period and breastfeeding.
www.kagankocatepe.com