In my fanfic, this is the canon version on how Sunset found out she's pregnant. (That arm belongs to Nurse Redheart, not Pinkie) Here's the summarized story behind this: After getting hit by Equestrian Magic at Camp Everfree, Sunset started experenceing sharp pains in her abdomen. She rarely left the tent because she hurt so bad. After returning to the school, Nurse Redheart examined her. A couple days later the results came in: Sunset was pregnant! After trying to keep herself from passing out (which she failed), she told Principal Celestia and Vice Principal Luna about the baby.