Kim Kardashian and Kanye West are preparing to welcome their third child. According to TMZ, a surrogate hired by the reality star and her rapper husband is already three months pregnant.

An insider told the publication that the superstar couple has agreed to pay $45,000 (£34,000) in 10 monthly instalments of $4,500 to the unidentified woman from San Diego. Should there be more than one child, Kardashian and West pay $5,000 per additional child.

Other stipulations outlined in the contract are no drinking, smoking or drug use; no hot tubs or saunas; no raw fish; and no handling cat litter.

They are said to have found the surrogate, who is in her late 20s, via an agency and paid $68,850 for the service.

Kardashian, who suffered from placenta accreta − a potentially life-threatening condition which sees parts of the placenta grow too deeply into the uterine wall − during her two pregnancies had made no secret of her desire to expand her brood.