Aimstep Combo Hcg Pregnancy Fertility Reproductive Health Test Kit UOM:Box of 30 It has a residue free adhesive Safetec of America It has a residue free adhesive that's gentle and eases removal No tie at waist allows gown to hang properly on different size patients while ensuring complete patient modesty CLIA moderately complex for serum testing AimStep® Combo Fertility Test hCG Pregnancy Test Serum Urine Sample 30 Tests CLIA Waived for Urine CLIA Moderate Complexity for Serum Rapid test kit detects pregnancy by determining the presence of human chorionic gonadotropin (hCG): It's referred to as a "combo" test because either serum or urine can be used in test