Kim Kardashian West, Kanye West’s newborn daughter named Chicago

On Tuesday, Kardashian West confirmed the Monday birth of Chicago on her official website.

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“Kanye and I are happy to announce the arrival of our healthy, beautiful baby girl,” she said in a statement. “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.”

Chicago West was born Jan. 15 at 12:47 a.m. PT and weighed 7 pounds, 6 ounces. She joins big brother Saint West, 2, and big sister North West, 4.

According to a tweet from the new mom of three, Chicago will go by the name Chi, pronounced "Shy," as in the abbreviated name of the city.

It was confirmed in September that the celebrity couple were expecting a third child via gestational carrier.

People reported that Kardashian West, 37, said her decision to hire a gestational surrogate came after her two high-risk pregnancies.

"I have always been really honest about my struggles with pregnancy," she said on her website Thursday. "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.

“I’m so grateful for modern technology and that this is even possible,” Kardashian West wrote. “It’s not for everyone, but I absolutely love my gestational carrier and this was the best experience I’ve ever had. Our gestational carrier gave us the greatest gift one could give.”