Correlation of Urinary and Serum Hormone Levels in Natural Cycle Frozen Embryo Transfer Cycles

To evaluate whether the measurement of urinary estrone glucuronide and luteinizing hormone (LH) concentrations with an at-home device is correlated with serum hormone levels within a natural cycle frozen embryo transfer protocol. The hypothesis is that home urinary monitoring can reliably detect the LH surge and serve as a trigger for timing the FET. Results of this study may ultimately lead to change in clinical practice by reducing the number of clinic visits for serum monitoring, offering a more convenient, time and cost saving method of detection of LH surge. If the proposed protocol were feasible and widely accepted by patients, this would prompt the wide adoption of a less invasive but equally as effective FET protocol.