Does endometrial scratching increase the rate of spontaneous conception in couples with unexplained infertility and a good prognosis (Hunault > 30%)? Study protocol of the SCRaTCH-... by B. N. Bui, H. L. Torrance, C. Janssen, B. Cohlen, J. P. de Bruin, J. E. den Hartog, P. J. Q. van der Linden, K. L. Deurloo, J. W. M. Maas, R. van Oppenraaij, A. Cantineau, C. B. Lambalk, H. Visser, E. Brinkhuis, J. van Disseldorp, B. C. Schoot, C. Lardenoije, M. van Wely, M. J. C. Eijkemans, F. J. M. Broekmans

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