A young couple with Down syndrome are desperate to get married and have children - even though their concerned parents fear they may never be ready.

Michael Cox and Taylor Anderton from Queensland met six years ago through competitive swimming and got engaged on a trip to America last year.

They have now set their sights on getting married and starting a family of their own.

'We want to have four kids, we're going to have three daughters and one son,' a 25-year-old Michael told Australian Story.

Michael Cox and Taylor Anderton from Queensland want to get married and have children but their concerned parents fear they will never be ready because of their Down Syndrome

'It's not that hard to have a kid. I know that some people say it's all about hard work, but it's not, it's all about love and compassion that you have for your child.'

While Michael and Taylor's parents accept that their children are happy together and support their relationship, they are hesitant about their aim to become parents.

'Taylor and Michael want to get married and have children and that makes me feel very worried, apprehensive and concerned,' Taylor's mother Catherine Musk said.

'It's not going to happen, it can't happen.'

Both of their families say they raised their children to believe in their dreams and live independently but now fear they may have set them up to fail with unrealistic expectations.

'I don't see parenthood being something that they're going to achieve or really they probably should achieve,' Michael's father Simon Cox said.

Michael and Taylor met six years ago through competitive swimming and got engaged on a trip to America last year

'It would be very difficult being a child whose parents both had Down Syndrome and couldn't have a job and couldn't drive a car and couldn't understand maths homework.'

Michael's mother Nikki Cox said the situation was a double-edged sword.

'For all his life we've imposed no limits but then it reaches a point where there are some things that he desperately wants to do and believes that he can do that are probably not going to happen,' she said.

The young couple have agreed with their parents to delay their wedding but remain determined to have children together.

'I know that their heart's in the right place but being overprotective is strictly not on with your child, even if they have Down Syndrome,' Michael said.

'I know that me and Taylor have the skills to be married and start our own family.'

While Michael and Taylor's parents accept that their children are happy together and support their relationship, they are hesitant about their aim to become parents

Taylor said: 'When my mum keeps talking about the rules and me and Michael's relationship, it does treat me like a child a little bit. I didn't understand love when I was little, but I do now, because I am (an) adult.'

The chance of two people with Down Syndrome falling pregnant is rare and if a couple were to fall pregnant there is a 50 per cent chance of the child having Down Syndrome.

Queensland disability advocate Michelle O'Flynn said the decision to become parents should rest with the couple.

'People with disability, like Michael and Taylor, are certainly entitled to bodily integrity and the freedom to do with their bodies as they wish,' she said.