No-Mos: Women who aren't having children

One in five women in Canada are reaching their mid-40s without having had children - twice as many as a generation ago. These women - dubbed ' No-Mos', or 'Not Moms' - are are becoming an increasingly vocal, mobilized force, determined to redefine the cultural narratives of motherhood and womanhood.   Lisa Manterfield, Melanie Notkin and Laura Scott, three prominent figures in the 'No-Mo' community, talk about what it's like to be "locked out of the Mommy Clubhouse."