The document discusses marketing baby products to modern dads who are more involved in childcare than in the past. It notes that 40% of mothers are now the sole or primary breadwinners. Dads want to feel useful during the "Fourth Trimester" period when babies rely most on their mothers, but dads are often unsure of how to contribute. The document outlines a marketing campaign for a baby product brand called Sensible to establish dads as heroes of the Fourth Trimester and show dads how Sensible can help them feel more confident and involved during this early period.