Skip to main content

Pre-Ovulatory Surge

Meaning

The Pre-Ovulatory Surge is the rapid, high-amplitude spike in the circulating concentration of Luteinizing Hormone (LH) and, to a lesser degree, Follicle-Stimulating Hormone (FSH), which occurs in the mid-menstrual cycle, typically preceding ovulation by a precise window of 24 to 36 hours. This massive, coordinated hormonal release is the definitive, non-negotiable endocrine event that critically triggers the final maturation and subsequent rupture of the dominant ovarian follicle, resulting in the release of the ovum. It represents a moment of absolute, critical hormonal signaling precision within the reproductive cycle.