Kim Kardashian and Kanye West will welcome their third child early next year via a surrogate mother who is currently three months pregnant.

The pair found their surrogate, a San Diego woman in her late twenties, via an agency, according to Us Weekly. Kardashian, 36, and West, 40, expect the newest member of their family to arrive in Jan. 2018.

The woman reportedly has been a surrogate in the past, and has appeared in promotional materials advertising the surrogacy process. As TMZ reports, Kardashian and West will pay 10 monthly installments of $4,500, for a total of $45,000 for the service, in addition to the agency's $68,850 deposit.

As part of her contract for the pregnancy with the couple, the surrogate must abstain from drinking, smoking, using drugs, going into hot tubs or saunas, eating raw fish, and handling cat litter, Us Weekly reports. All are standard guidelines for soon-to-be moms.

Kardashian and West are currently already parents to daughter North, 4, and son Saint, 19-months. Kardashian mothered both North and Saint, but ceded duties to a surrogate for this pregnancy after announcing health issues (a condition called placenta accreta) that resulted in high-risk terms for the reality star and her children.

"If the two doctors that I trust have told me it wouldn't be safe for me to get pregnant again, I have to listen to that," Kardashian said in an Oct. 2016 episode of Keeping Up with the Kardashians, People reports.