IKEA and Swedish design agency Ã…kestam Holst have created an advert that acts as a pregnancy test, revealing a special offer when it detects a positive result in a woman's urine.
At first glance, the design ? which featured in a Swedish women's magazine ? appears much like an ordinary IKEA advert promoting the brand's Sundvick baby crib.

But further down the page, women are instructed to apply a sample of urine on a marked area. If they are pregnant, their urine will cause the advert to change, to show a special discount offer on the crib.
While it looks as though the advert is offering a discount to pregnant women, it is actually intended to advertise IKEA's membership club IKEA Family.

"The whole ad is a pregnancy test that actually interacts with your potential pregnancy," said Ã…kestam Holst, an ad agency based in Stockholm. "Instead of a simple line indicating a positive result, IKEA presents you with a better price on a new baby crib if you're pregnant. All in real time, right there in the ad."

To create the advert's interactive function, IKEA and Ã…kestam Holst partnered with materials research company Mercene Labs.
The starting point was a strip found inside pregnancy tests, which reacts to the pregnancy hormone human chorionic gonadotropin (hCG) and causes a change in colour.
Across a period of four months, the team worked to scale up this standardised method so that it would work for an A4-sized printed advert.

"Mercene Labs used thei...