Abstract
The efficacy of two granulocyte colony-stimulating factor (G-CSF) protocols for thin endometrium were investigated. Eighty-two patients were diagnosed with thin endometrium (<7 mm). Thirty patients with previously cancelled embryo transfers received intrauterine G-CSF in subsequent frozen embryo transfer (FET) cycles. Patients were divided into the G-CSF only and G-CSF with endometrial scratch subgroups. Compared with previous cycles, endometrial thickness increased from 5.7 ± 0.7 mm to 8.1 ± 2.1 mm after G-CSF treatment (P < 0.001). Endometrial thickness increases were not significantly different between the two subgroups. The G-CSF with endometrial scratch subgroup established nominally higher though non-significant clinical pregnancy and live birth rates than the G-CSF only subgroup (53.8 % versus 42.9% and 38.5% versus 28.6%, respectively). Fifty-two patients underwent FET despite edometrial thickness less than 7 mm, and were included as controls. Significantly higher embryo implantation and clinical pregnancy rates were observed in the G-CSF group compared with the control group (31.5% versus 13.9%; P < 0.01; 48.1% versus 25.0%; P = 0.038, respectively). Endometrial scracth did not impair G-CSF treatment for thin endometrium and favoured pregnancy and live birth rates. For patients with thin endometrium, embryo transfer cancellation and G-CSF treatment in subsequent FET cycles is beneficial.
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