TY - JOUR AU - Polis, Chelsea B. PY - 2018 DA - 2018/06/25 TI - Published analysis of contraceptive effectiveness of Daysy and DaysyView app is fatally flawed JO - Reproductive Health SP - 113 VL - 15 IS - 1 AB - In March 2018, Dr. Martin C. Koch and colleagues published an analysis purporting to measure the effectiveness of the Daysy device and DaysyView app for the prevention of unintended pregnancy. Unfortunately, the analysis was flawed in multiple ways which render the estimates unreliable. Unreliable estimates of contraceptive effectiveness can endanger public health. SN - 1742-4755 UR - https://doi.org/10.1186/s12978-018-0560-1 DO - 10.1186/s12978-018-0560-1 ID - Polis2018 ER -