Kim Kardashian West and Kanye West's daughter is a "godsend" to them

A source told People magazine: "This baby is a godsend to them. After their rough year, his problems and all their stuff, they needed this reset. They recognise that this pregnancy is a gift from God, and they’re just so grateful."

Kim and Kanye - who already have two-year-old son Saint and four-year-old daughter North together - announced the happy news in a post on her app.

Taking to the site, they shared: "We are incredibly grateful to our surrogate who made our dreams come true with the greatest gift one could give and to our wonderful doctors and nurses for their special care. North and Saint are especially thrilled to welcome their baby sister."

Kim had previously admitted to finding the surrogacy experience to be even more stressful than giving birth herself.

She explained: "Anyone that says or thinks it is just the easy way out is just completely wrong. I think it is so much harder to go through it this way, because you are not really in control. And, you know, obviously you pick someone that you completely trust and that you have a good bond and relationship with, but ... knowing that I was able to carry my first two babies and not my baby now, it's hard for me. So it's definitely a harder experience than I anticipated in the control area."