Question: does callie baby die in season 7 episode 18

Answer: No, When Torres again goes into cardiac arrest, Montgomery delivers her daughter at twenty-three weeks's gestation. The baby is initially unable to breathe, so with Sloan's support, Robbins steps in and is able to revive her. Across the operating room, Torres's condition begins to improve. Once the surgery is complete, the doctors deal with their own affairs; Sloan's former partner Lexie Grey (Chyler Leigh) commits to her new relationship with resident Jackson Avery (Jesse Williams); Lexie's sister (and series main character) Meredith Grey (Ellen Pompeo, primary series star) confesses that she was jealous of Torres's pregnancy, which prompts her husband Derek Shepherd (Patrick Dempsey) to promise that they will have a child together; Altman tells Yang that she can no longer teach her; Sloan and Robbins bond over their shared parenthood. Later, as Robbins keeps a vigil by Torres's bedside, the hallucinatory Torres is able to rouse her recovering self. As she regains consciousness, Torres accepts Robbins's proposal.