LH (Luteinising Hormone)
LH is a hormone that plays a vital role in ovulation and your menstrual cycle. It works closely with FSH to help eggs mature and trigger their release from the ovary. Because of this, LH is commonly measured during fertility investigations, particularly if your periods are irregular or your doctor suspects a hormonal imbalance.
An LH result can sometimes seem confusing. A level that is considered normal for one person may not be normal for another, and the timing of the test during your cycle can make a significant difference. On its own, an LH result rarely provides clear answers, which is why it is usually interpreted alongside other hormone tests such as FSH, oestrogen and AMH.
This hub explains what LH does, why it is tested, what different results may indicate, and how doctors use it to help understand your fertility. You'll also learn about the relationship between LH and conditions such as PCOS, and why looking at your overall hormone profile is far more helpful than focusing on a single result.
Take your time exploring the articles below, and remember that your hormone levels are only one part of your fertility story.