LHpeak

LHpeak is a term that refers to the surge in luteinizing hormone (LH) that occurs naturally in the female reproductive cycle. This surge is a critical trigger for ovulation, the release of a mature egg from the ovary. The LH surge typically begins about 24 to 36 hours before ovulation occurs. It is caused by a complex interplay of hormonal signals, primarily driven by rising estrogen levels from the developing follicle in the ovary. This increase in estrogen signals the pituitary gland to release a large amount of LH.

Monitoring the LH surge is a common method used to predict a woman's fertile window, especially for those trying to conceive. Over-the-counter ovulation predictor kits detect the LH surge in urine. When a positive result is detected, it indicates that ovulation is likely to occur within the next 24 to 48 hours, making it the most fertile time. The LH surge is a short-lived phenomenon, typically lasting for a period of about 48 hours. After ovulation, LH levels decrease. Understanding the LH peak is fundamental in reproductive biology and fertility management.