Kim Kardashian West says having another child ''can't come soon enough''.

The 34-year-old star and her husband Kanye West are desperate to give their 19-month-old daughter North a younger brother or sister and have been ''really trying'' to conceive.

She said: ''We've really been trying for another kid. More kids can't come soon enough!''

The couple are enjoying being parents but the rapper suffered at the hands of his daughter recently when she flushed the 37-year-old star's mobile phone down the toilet.

She said: ''She took Kanye's phone and put it in the toilet and flushed it!''

As well as having a naughty streak North has been learning some words and is already able to identify the moon, much to the surprise of her reality TV star mother.

She added to PEOPLE magazine: ''She is halfway potty trained, which is insane for her age. Last night, she looked up at the sky and pointed and said, 'Moon, Mom! Moon!' I couldn't believe she knew that.''

While Kim is not known for her religiousness, she recently prayed that she could have another child because she is so keen to be pregnant again.

The 'Keeping Up with the Kardashians' star - who attended a Roman Catholic all-girls school - said: ''I'm praying about it. I am not pregnant right now, not that I know of, but no, I'm not. I wish I was. I'm about 15 pounds heavier, but I'm not [pregnant.]''