Pete Davidson's pregnant girlfriend Elsie Hewitt feared she was infertile after being diagnosed with endometriosis.

The Saturday Night Live star and his partner are expecting their first child together and Elsie has now revealed she spent years battling the painful condition - in which cells similar to those in the lining of the uterus grow in other parts of the body - and feared she would never have children until she underwent surgery to ease her symptoms and "preserve" her fertility.

She told PEOPLE: "I was 100 per cent convinced that I was infertile and not going to be able to have kids. So I do think a big part of why I opted for the surgery was, obviously first and foremost my symptoms, but second to preserve my fertility or try to get to a place where I could sustain the chances of having a family one day."

Elsie went on to admit she feels "very grateful" for the way her life has turned out and she is excited for Pete to become a dad, revealing he's been taking good care of her throughout the pregnancy.

She said: "I think we're going to be cool parents. I hope! I sometimes just see or feel the way that we are with one another, and I'm really glad and I'm really proud that this is how it is and this is how it's going to be.

"I could not ask for a better father for my child. I'm so happy it's him ... I think he's going to be such a good dad. I'm so excited to see it ... "

Pete previously confessed he feels "so guilty and horrible" that Elsie is unable to go through an "ideal" pregnancy because of the public scrutiny they face as a couple in the spotlight.

Speaking on The Breakfast Club, he said: "I feel bad for my girl because I bring a lot of s***. "Anything I do or she does now is gonna be a thing.

"She's a very private person and she's the one doing all the work. It's supposed to be a beautiful experience.

"She's never made me feel this way or said anything, but I feel so guilty and horrible that I could not allow her to have the ideal pregnancy that almost every woman gets to have and enjoy."