Optimum number of oocytes for a successful first IVF treatment cycle. - Van Der Gaast, Mark; Eijkemans, M. J. C.; Van Der Net, J. B.; De Boer, E. J.; Burger, C. W.; Van Leeuwen, F. E.; Fauser, B. C. J. M.; Macklon, N. S. (Reproductive BioMedicine Online (Reproductive Healthcare Limited), 2006)