January Jones, Mad Men
During Mad Men Season 5, January Jones was 8 months pregnant, but it definitely wouldn't have made sense for Betty to be. So, instead, her character just had dramatic weight-gain.
Charisma Carpenter, Angel
I mean, why hide a pregnancy when you can write in a whole storyline about being pregnant with an evil force? That's what the Buffy the Vampire Slayer spinoff, Angel, did with Cordelia's character. Apparently, it was also a last minute decision since Chase didn't reveal that she was pregnant right away.
Amy Poehler, Parks and Recreation
The nice thing about comedy is when that can find excuses to hide behind all sorts of ridiculous things. And that's just what Amy Poehler had to do on Parks and Recreation.
Kerry Washington, Scandal
Wardrobe changes and really big bags were just two of the tricks Scandal used to hide Kerry Washington's baby bump. Add to that having her hide behind all sorts of objects, and it made playing Olivia Pope extra difficult.
Sarah Jessica Parker, Sex and the City
Carrie Bradshaw wasn't exactly going to be having a baby of her own on Sex and the City Season 5, so instead, her character's fashion had to cover up Sarah Jessica Parker's baby bump. That meant flowing dresses galore.
Keri Russell, The Americans
Keri Russell and husband Matthew Rhys, who are also married on the show, were expecting a child while filming the series. Mostly, her baby bump was disguised with things like big coats and grocery bags, though they also used CGI occasionally to erase the bump.