It looks like someone is about to become pregnant on "Grey's Anatomy" season 10. One of our favorite couples, Callie (Sara Ramirez) and Arizona (Jessica Capshaw) aka Calzona are ready to add another baby to their family.

According to E! News, the pair has every intention on making Sofia a big sister however, they have a major decision to make before they start creating a nursery and buying the cutest baby clothes.

In a new spoiler sneak peek of Thursday night's episode, Callie and Arizona discuss who will be the one to get pregnant.

In episode 20, "Go It Alone," we find out who we will see with a baby bump in the future however, the couple picks an unusual way to decide the ridiculously important decision.

So how does Calzona decide who will carry their baby? Do they get into a heated debate? Do they make and educated decision based on health risks? Or do they flip a coin?

Well, if you didn't guess already, they flipped a coin while sitting in bed.

To check out the clip of "Grey's Anatomy" season 10 episode 20, "Go It Alone" click HERE.

While Callie and Arizona are excited to welcome a new member into their family the cast will be losing two members.

Not only will the cast and fans say goodbye to Sandra Oh's Cristina, but we will also see the departure of Tessa Ferrer and Gaius Charles who will not be returning as series regulars.

"Grey's Anatomy" airs Thursdays at 8 p.m. on ABC.