Footage of a US family with 13 children getting very excited when their parents announce yet another new baby is on the way.

The video, captured at a home in Muncie, Indiana, shows the children wearing a t-shirt with the word "chicklen" (the made-up word the father uses for calling his children) and their birth order number written on it.

The dad opens a gift bag and unfolds a babygro that reads "Chicklen 14."

When the children realise they are having a new sibling, they can't contain their joy.

"I called it," says one of the girls.

"Mum you're pregnant!" says another one screaming.

The mother later wrote online: ''After 22 years in the navy we decided we were done with having kids.''

''Well, here we are 18 months later and expecting baby 14.''

''We decided to tell the kids we wanted to update a family picture with a theme this time. So I bought the kids a t-shirt that said 'chicklen', along with the year they were born.''

''They all opened their gift bag and put on their shirts. Then dad opened his,'' she continued.

''The kids' reaction is priceless.''

After 22 years in the navy we decided we were done with having kids. Our last child, baby #13, was born on my husband's last day in the navy. An awesome retirement gift. Well here we are 18 months later and expecting baby #14. We decide to tell the kids we wanted to update a family picture with a theme this time. So I bought the kids a t- shirt that said chicklen #, whichever they were in birth order, along with the year they were born. They all opened their gift bag and put on their shirts. Now it's dads time to open his and join in on the picture. Dad opens his and it's a onesie that says baby #14 due may 2018. The kids' reaction is priceless. Also baby 14 is due on one of my other kid's birthday, May 5th.