Courteney Cox and husband David Arquette are trying for another baby.

The former 'Friends' star and the actor are keen for their three-year-old daughter Coco to have a sibling and are said to be undergoing IVF treatment.

The couple - who married in 1999 - are reported to have initially clashed over their family plans because Courteney, 43, wanted to focus on her new US TV show 'Dirt'.

A source close to the couple - who conceived Coco with the help of fertility treatment - told Closer magazine: "David was ready to start trying for a baby again, but Courteney wasn't and she had a full schedule of filming to contend with.

"The truth is she didn't know if she had the energy to go through the IVF ordeal again. It was so hard last time.

"But she's ready now and hopefully it will be easier this time."

Courteney has previously spoken about her struggle to conceive Coco, who will turn four in June.

She said: "My emotions were all over the place. I'll probably do it one more time."

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