Khloe Kardashian has teased a member of her family is pregnant.

The 'Keeping Up with the Kardashians' star - who is currently single - posted a picture of a positive pregnancy test on Instagram and suggested it belonged either to herself, one of her sisters Kim or Kourtney, half-sister Kendall Jenner or mother Kris Jenner.

She captioned the picture, which was later deleted: ''Who's pregnant? Kim, Khloe, Kendall.''

She also accompanied it with pictures of herself, Kourtney, Kim and Kris but appeared to dismiss it could be her mother by writing: ''I think we could rule Miss Menopause out of this equation.''

Khloe's social media posting came after a trailer for the new series of 'Keeping Up with the Kardashians' showed her left open-mouthed as an unidentified hand held up a positive pregnancy test.

And also in the trailer, Kim - who has been open about her difficulty in conceiving before having daughter North, 18 months, with husband Kanye West - was seen having an ultrasound examination.

In the clip, Kim's doctor said: ''We want to see another pregnancy some time soon.''

Khloe, 30, was also seen poking fun at her 34-year-old sister's desire to have another baby in a backstage dressing room.

She asked her: ''Was Kanye just here? You didn't bone in a bathrobe? That's how hard you're trying?''

Elsewhere, the trailer also suggested tensions between the family in the upcoming series of the show.

Kim wants her sisters to appear in a video game but is left stunned when she receives a legal letter in the post.

Her mother and manager, Kris, tells her: ''This is a cease and desist. [It's from] Kourtney Kardashian.''