Kim Kardashian West has thanked her surrogate mother after her baby was born on Monday (15.01.18).

The 37-year-old reality star and her husband Kanye West hired a surrogate mother to carry their third child after the beauty suffered complications whilst pregnant with four-year-old North and two-year-old Saint, and after their tot was born earlier this week, Kim has taken to her app to send her gratitude to the woman who carried her baby.

Writing on her app on Thursday (18.01.18) she said: ''I'm so grateful for modern technology and that this is even possible. It's not for everyone, but I absolutely love my gestational carrierand this was the best experience I've ever had. Our gestational carrier gave us the greatest gift one could give.

''The connection with our baby came instantly and it's as if she was with us the whole time,'' she adds. ''Having a gestational carrier was so special for us and she made our dreams of expanding our family come true. We are so excited to finally welcome home our baby girl.''

Throughout the post, the 'Keeping Up with the Kardashians' star references her surrogate as a ''gestational carrier'', as she explained that is the ''technical term'' for a woman who carries a baby with which she has no relation.

She explained: ''I have always been really honest about my struggles with pregnancy. Preeclampsia and placenta accreta are high-risk conditions, so when I wanted to have a third baby, doctors said that it wasn't safe for my - or the baby's - health to carry on my own.

''After exploring many options, Kanye and I decided to use a gestational carrier. Although I have used the term surrogate in the past, a gestational carrier is actually the technical term for a woman who carries a baby that she has no biological relationship to.

''A traditional surrogate donates her egg, is artificially inseminated with the father's sperm and then carries the baby to term. Since we implanted my fertilized egg in our gestational carrier, our baby is biologically mine and Kanye's. You can either choose someone that you know or you can go through an agency, like Kanye and I did.''

Kim also noted that she found it ''so hard'' to not be carrying her own child, and said anyone who thinks surrogacy is an easy option is ''completely wrong''.

She said: ''Having a gestational carrier is definitely different, but anyone who says or thinks it's the easy way out is completely wrong. People assume it's better because you don't have to deal with the physical changes, pain or complications with delivery, but for me it was so hard to not carry my own child, especially after I carried North and Saint.''