Ovulation Hormone

Luteinizing Hormone (LH) and Ovulation Testing

LH is a vital hormone in women's reproduction. It comes from a small but powerful gland in the brain, the anterior pituitary gland. LH plays a crucial role in controlling the menstrual cycle and helps predict fertility.

LH's Role in Ovulation

LH is central to the process of ovulation, where a mature egg is released from the ovary and can be fertilized. This typically happens in the middle of the menstrual cycle, making it the best time for getting pregnant.

The LH Surge and Ovulation

When estrogen levels rise before ovulation, the brain senses this change. It signals the anterior pituitary gland to release a surge of LH. This LH surge, which occurs about 24-36 hours before ovulation, triggers the release of a mature egg from the ovarian follicle, making it ready for fertilization.

LH Tests and Predicting Ovulation

Ovulation tests, also known as LH tests or ovulation predictor kits, use the LH surge to help women figure out when they're most likely to conceive.

How to Use Ovulation Tests

1. Collect a urine sample, usually around 20 ml, in a cup.
2. Dip the ovulation strip into the urine, making sure it reaches the marked line.
3. Wait for about 5 minutes.
4. Compare the color of the test line to the control line on the strip.

Interpreting the Results

  •  If the test line is much lighter than the control line, it means LH levels are low, suggesting that ovulation isn't close.
  • -If the test line is almost as dark as the control line, it indicates high LH levels.
  •  If the test line matches or is darker than the control line, it means LH levels have peaked, signaling that ovulation is likely to happen in the next 24-36 hours.

It's important to start testing before the LH surge reaches its peak because LH levels can stay high for a couple of days. The timing of this surge can vary between individuals, so following the instructions on the ovulation test kit and keeping track of your menstrual cycle can help determine the best time to start testing.

Having intercourse just before the LH surge increases the chances of conception because it ensures that sperm is present when the egg is released during ovulation, improving the chances of a successful pregnancy.


For more help tracking your cycle and knowing when you ovulate download the Fertilitae app! 


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