The ultrasound tech told me she could tell the sex of my baby at 12 weeks and I want to know yet was it probably a boy?

There is no way for an ultrasound tech to give 100% accuracy for telling the sex of a baby at 12 weeks. The development of the genitals varies from baby to baby, and it can be challenging to differentiate between male and female genitalia at such an early stage of pregnancy. While an experienced ultrasound tech may make an educated guess based on their experience and the appearance of the developing organs, it's crucial to remember that these predictions are not definitive.

The most reliable method of determining the sex of a baby during pregnancy is through a comprehensive examination of the fetal anatomy during a mid-pregnancy ultrasound, typically performed between 18 and 20 weeks of gestation. At this stage, the baby's gender can usually be identified with greater accuracy based on the external genitalia and other relevant anatomical features.

Therefore, while an ultrasound tech may suggest the sex of your baby at 12 weeks, it is important to view this information as a potential indication rather than a definitive confirmation of gender. The ultrasound tech may revise the prediction during subsequent examinations as the baby's development becomes clearer.