Courteney Cox and David Arquette are planning to adopt a child to try and save their marriage.

The couple — who have been married for nine years and already have four-year-old daughter Coco — are desperate to add to their family but Courteney (44) has so far been unable to fall pregnant, causing arguments between the pair.

According to National Enquirer magazine, a source said: "David wants a sibling for Coco, but Courteney's reached a point where she feels it's hopeless to keep trying to get pregnant.

“They love each other very much, but with Courteney's intense work schedule and her resistance to adoption, David started to go out without her.

"Don't wait as long as I did"

"But now Courteney's given the okay to adopting a brother or sister for Coco, David has agreed to scale back on nights out."

Cox has previously admitted she struggled to conceive Coco, but says being a mother is "everything" to her.

She said last year: "I can't imagine life without a child — I don't even remember what it was like four years ago. Coco is everything to me. We did a lot of in vitro fertilisation, and it was tough. But we'd waited a few years before trying, and in retrospect I would say, 'Don't wait as long as I did, especially if you want more than one child.' "