It's estimated that 1 in 8 American women will develop some form of breast cancer over the course of their lifetime.
After decades of rigorous research, the U.S. Food and Drug Administration (FDA) approved the first drug aimed to treat women with advanced breast cancers, particularly the ones caused by BRCA 1 and BRCA 2 gene mutations.
This form of breast cancer became quite notable after Academy Award-winning actress Angelina Jolie revealed she underwent a double mastectomy after testing positive for BRCA 1.
Jolie removed her breasts after being told she's at high risk for developing breast cancer, and later removed her ovaries and Fallopian tubes after a second health scare.
Dubbed the "Jolie gene," these flawed genes increase a woman's risk of developing breast tumors from 12% to 90%.
On Friday, the highly anticipated drug, known as Lynparza, can finally be used on patients, and it has everyone wondering how it's going to work and how much it will cost.