Determine the exact day your ovary releases a mature egg and identify your most fertile hours for natural conception.
Egg is released 24–36 hours after the LH surge. Use OPK strips to confirm.
Each month, follicle-stimulating hormone (FSH) stimulates several ovarian follicles to mature. One dominant follicle develops fully and ruptures, releasing a mature oocyte (egg) into the fallopian tube. This egg travels toward the uterus and survives 12–24 hours — during which it must be fertilized to create an embryo.
Approximately 24–36 hours before ovulation, the pituitary gland releases a surge of luteinizing hormone (LH). This surge triggers the follicle to rupture and release the egg. Ovulation predictor kits (OPKs) detect this LH surge in urine — giving you advance warning that ovulation is about to occur.
Medical Disclaimer: This tool is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for personalized guidance.
The egg release calculator tells you exactly when your egg is most likely to be released from the ovary — a process called ovulation. Knowing this window is essential for both trying to conceive and understanding your cycle.
Each month, your pituitary gland releases a surge of LH (luteinizing hormone) that triggers the dominant follicle to rupture and release a mature egg. The egg then travels down the fallopian tube toward the uterus, where it can be fertilized by sperm for up to 24 hours.