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The effect of LV infusion of aCSF or naloxone for 3 h with (a, b) or without (c, d) sex steroids, estrogen (E) and progesterone (P), on plasma LH levels in lean hypogonadotropic OVX ewes. e Analysis of mean LH concentration, LH pulse amplitude, LH interpulse interval (min), and LH pre-pulse nadir. Arrowheads indicate an LH pulse.
