Jen Arnold, 39, of the TLC series The Little Couple has announced she has been diagnosed with cancer, according to PEOPLE.

The neonatologist is currently undergoing treatment, including surgery and chemotherapy, for her rare form of cancer. However, the reality star has not confirmed the type of cancer she is battling.

"I am very fortunate as the prognosis is good," Arnold told the magazine. "While there is never a good time to get news like this, getting it just as we are building our new family is tough in many ways ... But being surrounded by the love of my husband and our two beautiful children is actually in many ways giving me the strength to fight it even stronger."

Arnold and her husband Bill Klein, 38, have two adopted children together, their 3-year-old son Will and 2-year-old daughter Zoey. Millions of views have tuned in to watch "The Little Couple", who have been open about their personal struggles, including their fertility issues.

"Jen has achieved so many great things," Klein told PEOPLE in a previous interview about trying to start a family. "We are so in love with each other and supportive of each other that we are going to be ok. Few people are so lucky to have what we do, from the moment you meet that one person and everything that you do together, everything that you add to that relationship is exciting as well. We are up for challenges."

Arnold has reportedly undergone multiple surgeries related to her type of dwarfism, but hasn't let anything stop her from achieving success in her career or personal life.

"For a lot of people, loss tears them apart," Arnold told PEOPLE in an earlier interview. "In general, we are pretty tough people. I feel very lucky and fortunate to have the wonderful life I have. We are good at putting things in perspective because of our life experiences. I am not a person to give up when something is important. We feel so lucky to be parents."