The prelfie is a a selfie, but with a stomach rather than a person as the star of the show, and the only limitation being the creativity of the mother to be. It's a new phenomenon combining biology, psychology, and social networks.
The traditional pregnant selfie involves lifting your top and putting the bulge to the fore. The idea recently made its debut on a maternity website, and was an immediate success, filling the pages of social networks with pictures of bellies: hence the alternative name of bellfie. Apart from their purely hedonistic side, prelfies are about sharing the joys of maternity online.
But what makes a good prelfie? To a large extent it should follow the same unwritten aesthetic code as the selfie, for example favouring natural light over harsh white flash, and choosing an appropriate background to make the image as interesting as possible.
Fathers-to-be also have a specific role to play in the new world of the prelfie, helping to spread their partners' pictures far and wide, adding comments of their own, and perhaps running sweepstakes on the baby's gender or exactly how far advanced the pregnancy is.
And now, another innovation is spreading across social networks: it's called the #brelfie, a woman's pictures of herself breastfeeding. It's gaining ground fast thanks to the hashtag, used by celebrity mothers such as actors Olivia Wilde and Alyssa Milano and models Miranda Kerr and Gisele Bündchen.