SEMLOHE 28

In the UK the Clearblue Digital Pregnancy Test will not only tell you if are pregnant or not, it will also tell you how long ago you conceived. The Clearblue Digital Pregnancy Test with Conception Indicator not only detects HCG in a woman's system, but measures it to date when conception occurred.

Of course it isn't available in the United States, but they can be found here on eBay.