|Christina Milian was 8 months pregnant when she filed for divorce from The Dream in 2010.|
|In 2004, four months before delivering her 1st child, son Leni, whose dad is billionaire Flavio Briatore, Heidi Klum started dated Seal, who she later married and had 3 kids with before they too split in 2012.|
|Rapper Nas and singer Kelis were in the middle of filming their MTV reality TV show when they split while she was 7 months pregnant with their first child together in 2009.|
|Alexis Knapp had to get Ryan Phillippe to submit to a paternity test to prove that the child she was carrying was his. The two split before Knapp confirmed she was pregnant in 2010.|
Edited to Add: I found this post of 12 Celebrities that broke up before the baby was born that Crushable did a year ago which also includes Denise Richards and Charlie Sheen, Tom Brady and Bridget Moynahan, Mary Louise Parker and Billy Crudup and Tiki and Ginny Barber which I so would have added to this list had I remembered about them too!