LH commonly refers to Luteinizing Hormone in biology or medicine. It's a hormone produced by the pituitary gland and plays a vital role in regulating the reproductive system for both men and women. Here's a detailed breakdown:
During the follicular phase of the menstrual cycle, LH levels are relatively low. This low level of LH helps to support the early growth and development of follicles in the ovary.
As the dominant follicle matures, it begins to produce more estrogen. This increase in estrogen initially leads to a slight decrease in LH levels due to a negative feedback loop. However, as estrogen levels continue to rise, they eventually reach a threshold that triggers a positive feedback loop. This positive feedback loop leads to a surge in LH, which is crucial for triggering ovulation.
Normal Range
mIU/L IU/L
1.37-9.9 1.37-9.9