A comment by Organic Marble on the question Is it possible to get pregnant through natural means in space? includes a link to PREGNANCY TEST (ISS MED/3A - ALL/FIN) which seems to indicate there is a pregnancy test kit on the ISS.
As indicated in the original question mammals do not seem able to get (or stay) pregnant in the ISS.
Why is the test kit there? Has it ever been used? What is the procedure if the results where positive?