Hello everyone! Moms of boys, has anyone experienced this? My son's te…

Hello everyone! Moms of boys, has anyone experienced this? My son's testicles haven't descended. They seemed fine at birth, but then they disappeared and his scrotum is getting smaller every day, it's really shrunken and reduced. Some say this happens over time and will eventually drop. But he's already 9 months old and I don't know if I should be worried or not?! Please answer only appropriate ?? rude comments and life is full of them ☺️ Thanks in advance!