Complex sentence: On 19 March 2012, Anderson announced that she was four-and-a-half months pregnant, and joked that she would have to conceal her bump on-screen with large handbags and by standing behind the bar, before going on maternity leave.
Split into simpler sentences: On 19 March 2012, Anderson announced that she was four-and-a-half months pregnant. She also quipped that she would have to conceal her bump on-screen by standing behind the bar and using large handbags, before going on maternity leave.