This ad is real and is running in a magazine, which the they say is one of Sweden’s more popular magazines for women. Here’s a bit more from them:
In order to make the interactive functions of this ad work in reality, we had to make several technical advancements. The pregnancy test strip was used as a starting point, which relies on antibodies that bind to the pregnancy hormone hCG, resulting in a color change. For scaling up of this technique and adopting it to the physical format of a printed ad, Mercene Labs has used their experience in development of surface active materials for microfluidics and medical diagnostics. Careful selection of materials, together with a controlled capillary flow have been crucial for the success of this project. Technical advancements made during the work with this campaign have the potential to improve medical diagnostics.