For many years Muhl, her family, and doctors believed the darker coloration on the left side of her torso was simply a very large birthmark.

At an early stage of the pregnancy, the two eggs fused, which left Muhl carrying her twin sister's genes in her own body.

[11] Given the high visibility and need for publicity in these lines of work, Muhl was initially scared that her chimerism could have a negative impact on her career opportunities; thus, she kept it a secret outside of friends and family upon being diagnosed.

[13] After appearing on the show, Muhl's segment went viral, resulting in millions of views on YouTube and hundreds of shares online.

In 2018, Muhl was a featured guest on Megyn Kelly Today, where she shared with the audience how her particular case of chimerism is linked to autoimmune deficiencies, as her two sets of genes are not fully compatible with one another.