What actually causes ovulation? And what is an LH-Surge?
Ovulation FAQ By definition, ovulation is the process of an ovary releasing an egg from the follicle – permitting the egg to float down the fallopian tubes. Directly prior to ovulation, a dramatic hormonal change takes place – the LH Surge. LH (or Luteinizing Hormone) is the hormone that actually facilitates ovulation: it causes the egg to separate from the ovarian surface. Ovulation predictor tests function by detecting this LH Surge, thus alerting the woman that ovulation is imminent.