first response early result pregnancy test sensitivity?
Sensitivity of over-the-counter pregnancy tests: comparison of utility and marketing messages
Abstract
Objective: To determine the sensitivity of seven over-the-counter pregnancy tests (OTC-PTs) using urine containing a mixture of human chorionic gonadotropin (hCG)-related molecules as found on the first day of missed menstrual period.
Design: Blinded in vitro sensitivity analysis.
Setting: Medical school