surge

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surge

Any marked ↑ in flow of a substance above a relatively constant baseline Reproductive physiology An abrupt ↑ in LH secretion Background LHRL–luteinizing hormone-releasing hormone is normally secreted in episodic bursts, resulting in cyclical peaks of LH; LHRH bursts are ↑ by estrogens and ↓ by progesterone and testosterone and ↑ in frequency until the end of the follicular phase, at which time a surge of LH signals the onset of endometrial secretion, in preparation for a fertilized egg