20 jan 2002 ano - Gender

Descrição:

At week 13 the baby's ovaries or testes are fully developed. The genitals are also forming outside their body. The penis or clitoris will start forming, but you may not be able to tell the sex at an ultrasound scan, during this time.

Source
“Pregnancy and Baby Guide.” NHS Choices, NHS, www.nhs.uk/Conditions/pregnancy-and-baby/pages/pregnancy-weeks-17-18-19-20.aspx.