Home > Medical > Hearing management > FAQs 17 December 2008 Are certain children born deaf, or does it happen later? Most hearing impairment is inherited. But of all types of inherited deafness, only one third is present at birth. 0 Pin It Ask Hearing Care expert » Join Body Talk » Like Health24 on Facebook » Follow Health24 on Twitter » How noise affects your health The worst noise makers in your office Most hearing impairment is inherited. But of all types of inherited deafness, only one third is present at birth. Another third starts during childhood and the other third only manifests in adulthood. More in Medical Do cochlear implants give someone normal hearing? More: Hearing managementFAQs advertisement Get a quote Bestmed - offering you quality healthcare and freedom of choice Momentum - save up to 35% on healthcare Medihelp - quality, affordable medical scheme cover advertisement Read Health24’s Comments Policy Comment on this story 0 comments Add your comment Thank you, your comment has been submitted. Logout Comment 0 characters remaining Share on Facebook Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news News Triumph for traditional healers Medical Formula 1 noise can damage eardrums Parenting Parent work schedules affect relationships with kids Lifestyle Women find sexually explicit ads unappealing Lifestyle Number of UK teenage smokers a concern Lifestyle Blacks happier at work than whites From our sponsors Your retirement - a healthy mindset So many people, why so alone? You can still enjoy the sweet things in life Take the sugar test, it could save your life. Live healthier Stress » Childhood stress PTSD and weight Managing work stress The symptoms of stress Take a look at the symptoms of the acute fight-or-flight stress reaction and the effect of long-term, unmanaged stress. Men's health » Exercise and sperm Best sperm season Smoking and sperm How to boost the health of your sperm You’d think that with millions of babies being born each day, the average sperm is a pretty healthy swimmer. Not so. Here are a few things you can do to boost the health of yours.