Congenital hearing loss
Some people are born with hearing loss, which is either hereditary (genetic) or caused during pregnancy or childbirth. Today, children are screened after birth, so any hearing loss is discovered in most cases. However, it can be difficult to notice congenital hearing loss if it is mild, only in one ear, or develops later in life. Older people may not have been screened, and may have been living with congenital hearing loss all of their lives.