everyday on the show, we do a segment called the "big i" about big news ideas and innovations and solutions to big problems and in today's "big i" we want to talk to a group of johns hopkins graduates who are hoping to save millions of lives every year. they invented this basically a $1 pen that could screen up to 400 pregnant women for postnatal disease. according to the population fund everyday more than 1,000 women die of pregnancy-related complications and thousands more suffer from debilitating situations. here to tell us about it are two of the inventers from baltimore, maryland. shaurn, will you give us a little bit more idea of how the invention works and how a pen or