When Emily McMullan was born 22 months ago, doctors noticed something was wrong with her hearing.
Specialist tests revealed her to be severely to profoundly deaf.
Her father Paul, 34, and mother Rose, 29, at first struggled to deal with the news Emily may never hear, but soon dived head first into a network of support that Paul says has completely changed their lives.
The couple, from Baillieston, Glasgow, have seen Emily come on leaps and bounds since she was fitted with a cochlear implant, which means she can hear and interpret sounds.
Last December, with Emily aged just 13 months, she had the operation to fit the implant. The following month it was 'switched on'.
Since then, there has been no stopping Emily, who can say "dada", "mama" and "look".
Accountant Paul said: "When we were told Emily was deaf, it was very emotional and upsetting.
"I remember thinking, 'She will never hear me say 'I love you'.'
"When she was four weeks old she went through three hours of tests at Yorkhill Hospital, where they confirmed she was severely to profoundly deaf.
"But we realised there was all kinds of support available from the National Deaf Children's Society and Yorkhill.
"We were referred to the cochlear implant unit at Crosshouse Hospital in Kilmarnock, were Emily was assessed for suitability to be fitted with implants."
Doctors gave Emily the thumbs-up for implants but, in the end, they could operate only on her right side because a previous illness had left her with a calcium build-up under the skin around her left ear.
But even one implant is having a huge effect on the lively wee girl.
Paul said: "Every time we hear a new word it is emotional and wonderful.
"When I come home from work at night I wait at the front door and shout 'Emily' and my wee superstar comes running out for a hug.
"We can also take her swimming and she can keep her implant on rather than taking it off because they have developed a thing called an aqua kit to keep the device safe.
"We are so proud of Emily. She has been through a lot in the first 22 months of her life but she is always smiling and is a happy wee person."
The National Deaf Children's Society has arranged weekends for parents of young deaf children and Rose and Paul have learned a great deal from speaking with others in similar positions.
Paul is so impressed with the charity's work, that he is running the Great North Run on September 15 to raise funds for the Society .
He has never run long distance before, but has been training for the big day.
"I felt I wanted to thank them for all the support they have given us over the past 22 months," Paul said.
"I want to make Emily as proud of me as we are of her. I am hoping to raise £1000 and anything else is a bonus."
Emily's older brother Adam, 4, is also enjoying being able to communicate with his sister.
He even understands when she has not got the implant activated and asks his parents to turn it on.
And the family is set for a new arrival because Rose is expecting her third baby, due to be born in eight weeks.
Paul said: "It couldn't be better for Emily - she has a big brother who will look after her and will soon have a wee sister or brother she can look after as they grow up."
If you wish to contribute to Paul's fundraising effort, log on to: justgiving.com/Paul-McMullan2