Yes, it is generally possible to determine the gender of a baby through an ultrasound around the 17th week of pregnancy. However, it is important to note that the accuracy of determining gender can vary depending on various factors such as the position of the baby and the skill of the sonographer performing the ultrasound. At 17 weeks, your baby's genitals may be developed enough for a skilled sonographer to identify their gender. However, it is not always guaranteed, so there is still a chance that you may not get a clear answer during this scan. It's best to discuss your expectations and concerns with your healthcare provider or sonographer before going for the ultrasound. They will be able to provide you with more specific information based on your individual circumstances.