<qa>  What is the name of the urine pregnancy test performed for all females of child bearing potential atA urine pregnancy test will be performed for all females of child bearing potential at Visit 1 and again within the 48 hours prior to the receipt of the isotopes by mouth for both the abbreviated and post-study medication transit scintigraphy tests at Visit 2 and Visit 4. Note that females who are status post-bilateral tubal ligation, hysterectomy or postmenopausal are exempted from this test. 