Giuliana Rancic on Breast Cancer Diagnosis: 'God Was Looking Out for Me'

E! Entertainment host Giuliana Rancic announced Monday morning on NBC's Today Show that she is battling early stages of breast cancer.

"Through my attempt to get pregnant for the third time, we sadly found out that I have early stages of breast cancer," she said. "It's been a shock. A lot of people have been asking, we saw that you went and got IVF, are you pregnant? But sadly, we've had to put that off."

Rancic, who has documented her struggles to get pregnant on her reality show with husband Bill Rancic, "Giuliana and Bill," discovered the news after a doctor's visit for a third round of in vitro fertilization. The doctor said she needed a mammogram because if she did in fact have breast cancer and became pregnant, the pregnancy could accelerate the pace of the cancer.

Rancic, who is 36 years old, said she did not plan on getting a mammogram until the age of 40, as she had no family history of the disease.

"That was definitely the hardest day," Rancic said. "I went into the hospital in L.A. and when they came in to tell me they said it pretty quickly, and they just said 'I'm sorry you have breast cancer.' It's what you'd expect and so much more. It was incredible, instant sobbing and it was like the world just crashed down around me. I just couldn't believe it."

Rancic revealed that she will undergo surgery this week followed by radiation treatment for six weeks, and stated that she is still determined to get pregnant.

"I'm not going to give up, I want that baby," she said.

"What's amazing is that that baby will have saved my life because I've always said that this all happened to me for a reason; there was some master plan as to why my IVF didn't work, why I never got pregnant. And now I truly believe that God was looking out for me because had I gotten pregnant, a few years down the line I could be a lot sicker."