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Oocytes retrieved per cycle after FSH stimulation. A, Cumulative results from the Yale Fertility Center (2003–2005). The number of oocytes that mark the 25% and 75% interval of each age category is underlined. These numbers define low and high responses to FSH in our patient population. B, A graph depicting the data from patients under 35 yr of age. The gray areas represent the lower and higher 25th percentiles of the number of oocytes per cycle.
