Infertility Network Northern Ireland is campaigning on National Infertility Awareness week for families in the region to be allowed more than the one IVF treatment they are currently offered.
In Scotland and Wales two cycles are offered, while in parts of England couples are offered up to three full treatment cycles.
The treatment was a life-changing one for the Spiers family in Conlig, Co Down.
Ruth and David Spiers thought they would never conceive and infertility had placed a shadow over their lives for 10 years.
"It was an ongoing let down. An ongoing feeling of emptiness and failure for a woman, and so so important for us," Ruth explained.
But Ruth and David's pain turned to joy 10 years ago after IVF when Ruth became a pregnant aged 39.
"I was so nervous doing that test, it meant so much to us," she said.
"And I saw that blue line. My brother put on music and we danced in the living room. I came home and told my husband: 'I'm pregnant'. After all that time and it was just a miracle."
Describing the birth of her son David, she added: "He had tight curls, wee blonde curls (when he was born) and they went: 'it's a baby boy'. He was perfect to me, he was perfect."
Then a month after giving birth to little David - they were overjoyed to discover she had conceived again - this time naturally and little Sophie was born.
We just knew that we could give a child a loving home and we would do anything to achieve that.
The latest figures show that around a quarter of the 1,500 women who had IVF treatment in Northern Ireland last year were successful as in the Spiers' case.
The Department of Health say financial constraints prevent them from offering more than one free treatment.
The Health and Social Care board currently spends £3m per year in infertility services.
"It is recognised that some regions across the UK provide a greater number of treatment cycles than the available resources currently permit in Northern Ireland," a spokesperson explained.
"However, the access criteria in Northern Ireland, which were developed following public consultations in 2006 and 2009, are wider than in some other regions of the UK thus allowing more people to avail of publicly funded treatment.
"If we were to increase the number of individual treatments provided within current funding this would severely limit the number of women who could access the service."
But Sharon Davidson from Infertility Network argues that three cycles gives couples the best chance of conceiving.
"Couples know that, they're very very well educated in all of these issues to do with infertility and then they have the frustration of only getting the one NHS treatment in Northern Ireland, they know across the water they get two treatment cycles and it's really frustrating for them," she said.
Because of the limited treatment on the NHS, hundreds of couples turn to private fertility clinics for the best chance to get the family they dream for.
At Origin they say new technology is transforming the treatment they offer.
It offers continuous photography within the incubator allowing for the embryo's development to be recorded at literally every stage.
Dr Steven Green said: "We've been very surprised with it, the first number of patients that agreed for us to use the system for them were all getting pregnant which really validated the criteria that we were using and its impressed us so much that we're investing in more cameras and moving forward now with this technology."
The demand for a change in treatment offered has now reached Stormont, as an all-party working group has been set up to look at the regional disparity in treatment.