- Agree to have two medically supervised pregnancy tests with a minimum sensitivity of 25 mIU/ml (milli-International Units per milliliter) prior to starting Lenalidomide. The first pregnancy test must be performed within 10 to 14 days prior to the start Lenalidomide and the second pregnancy test must be performed within 24 hours prior to the start of Lenalidomide. The patient will receive Lenalidomide only after the study doctor has verified that the results of these pregnancy tests are negative. She must understand the need to commence the study treatment as soon as study drug is dispensed following the second negative pregnancy test. This requirement also applies to FCBP who practice complete and continued abstinence.