They had hundreds of reasons to celebrate; in fact 1,500 of them.

For that’s the number of babies born over two decades thanks to staff at the assisted conception unit run by the Calderdale and Huddersfield NHS Foundation Trust (CHFT).

The doctors and staff marked their 20th anniversary at the weekend and they were joined by many of the tots they have brought into the world.

Hundreds of babies and tots and their parents joined in the fun at the annual party hosted by the assisted conception (ACON) team.

The team continues to be among the most successful in the country with more than 1,500 babies born as a result of the care there.

When the unit first started, there were 50 IVF cycles a year. Now there 350 and it continues to have conception rates of around 35% - consistently higher than the national average. The team has specialists in both male and female fertility and a specialist nurses to help couples become families.

Consultant Martin De Bono cel;ebrates with mum Anna Bradnum, baby Bethany and dad Simon Reekie

Sister Helen Marvell said: “We are with our couples from the word go and throughout their journey. So for us to welcome so many back on such a happy day for everyone is always a very special day for us.”

Consultant Martin De Bono said the friendship and trust which builds up makes it special for staff and couples alike.

He said: “The teamwork is what makes CHFT care special. The smiles today are overwhelming and make it a very happy event for us as well as our families.”

READ MORE: Hospital shake-up chief Dr Steve Ollerton answers your questions

READ MORE: Watch as thousands gather in St George's Square for 16th St Patrick's Day Parade

There was face painting, bouncy castles, a ball park and Easter eggs for everyone at the event held at Calderdale Royal Hospital.

Mum Lindsay Mansfield, from Almondbury, came along with 15-month-old daughter Gracie and her sister Elaina. Gracie was born at the third IVF attempt for Lindsay and husband Allan.

She said: “We had been trying and it is very difficult and stressful. By the third round I couldn’t make the call to find out if it had been successful.

Kate and Lee Hamilton with twins Lydia and Grace

“My husband did it and I thought it was going to be no. I really could not believe it – I still can’t.”

Proud parents Anna Bradnum and Simon Reekie, from Elland, brought along three-month-old baby Bethany. Anna said: “We decided we needed help for us to have our baby and, at the time, that was devastating to us but from the word go I cannot praise the ACON team enough.

“From the very first appointment we were given the highest care. Not just the medical advice. You know they know their stuff, but the nurses support you as a person, emotionally too. Whenever I came in for an appointment I always left feeling better than when I arrived. When we were waiting for results it was both exciting and scary – all mixed up at once.”

Baby Gracie Mansfield with mum Lindsay and aunt Elaina

Simon said: “They care for so many couples yet the team always made it feel personal.”

Joanne and Simon Schofield, from Cowlersley, brought in 15-month-old twins Shay and Bryn. Joanne said: “We were hoping for one and got two little blessings. I can’t thank the ACON team enough. It is amazing what they have done for us.”

Kate and Lee Hamilton, from Elland, had twins Lydia and Grace 10 weeks early so the baby girls – each 3lbs 4 oz - spent time on the Special Care Baby Unit after they were born.

Kate said: “I always wanted twins and we now have two lots of hugs and two lots of cuddles.”

Simon and Joanne Schofield with twins Shay and Bryn