kimora-lee-simmons-newborn

New mom-of-four Kimora Lee Simmons introduced her son Wolfe via Instagram Friday.

“#WolfeLee is finally here!,” the model-entrepreneur shared. “After an all natural, intimate, beautiful, long birth! He’s everything we thought he would be and MORE! I am so grateful to my amazing husband for all of his support and love through it all. He never left my side! It wasn’t easy, but we did it!”

The reality star went on to talk about her natural birth.

“Thank you also to my special “nurse Maureen” and team that helped get this 11 pounder OUT of me! #Whoa #Wolfe #BabyWolfe #NaturalBirth #SkinToSkin #MotherOfFour,” she captioned the image with her sweet son.

Although she’s already given birth three times, Wolfe’s delivery was the most challenging delivery yet.

“My fourth delivery was definitely the most challenging — all natural and with no drugs!” the mommy mogul, tells PEOPLE. “It really shows that moms-to-be have the power to deliver any way they choose. Choice is what’s most important for women — across the board.”

The reality star — also mom to daughters Ming, 15, and Aoki, 12, with Russell Simmons, as well as 5½-year-old son Kenzo with Djimon Hounsou — welcomed Wolfe with husband Tim Leissner.

“Wolfe was a big boy! Handsome just like his father,” says Simmons. “[Wolfe was] 11 lbs. — a lot of work. But a labor of love! We’re all so happy he’s here.”

#WolfeLee is finally here! After an all natural, intimate, beautiful, long birth! He’s everything we thought he would be and MORE! I am so grateful to my amazing husband for all of his support and love through it all. He never left my side! It wasn’t easy, but we did it! Thank you also to my special “nurse Maureen” and team that helped get this 11 pounder OUT of me! #Whoa #Wolfe #BabyWolfe #NaturalBirth #SkinToSkin #MotherOfFour

A photo posted by Kimora Lee Simmons (@officialkimora) on Apr 24, 2015 at 12:55pm PDT