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A. GnRH (top), estradiol and LH (bottom) during an artificial follicular phase in sheep illustrating coincident onset of the GnRH and LH surges and prolonged duration of the former. B, C, pulsatile GnRH (top) and LH (bottom) release from the periods indicated by the bars labelled B, C in part A, * identified pulses. A-C adapted with permission from [32]..
