hello and welcome to HCM, Otosclerosis
is a common cause of conductive hearing loss
and it usually runs in the family. If you have any doubt a simple test called the audiometry
test can rule out if you have the same.
Perform a PTA test (a conductive hearing loss is suggestive of otosclerosis) and also perform impedance (an A type curve and typically As type of curve is suggestive of otosclerosis)
You can also perform a High resolution scan of the Temporal bone
which can demarcate some signs of otosclerosis
All said and then even you can get otosclerosis (maybe not because you mother has got it but even otherwise) and there is no way of preventing it. All you can do is go for continuous follow up with audiometry do that we can catch it as early as possible and start proper treatment.
Dr Sriram Nathan