The LH surge is a term used to describe the increase in luteinizing hormone and typically occurs on the 14th day of the menstrual cycle. When luteinizing hormone levels rise, it triggers ovulation within 36 to 40 hours. Once the egg is released, it can remain viable in the uterus for about 24 hours. This period is commonly referred to as the "fertile window," which is the only phase in a woman's menstrual cycle when conception is possible.
In a natural menstrual cycle, the LH surge usually occurs around the 14th day. However, if you are undergoing fertility treatment, whether with donor sperm or your partner's sperm, you receive a trigger shot to stimulate the production of necessary hormones, including the LH surge, to trigger ovulation.
What does the LH surge indicate?
The LH surge signals that ovulation is imminent. Ovulation is a crucial part of the female reproductive system, where an egg is released from the ovary. The hormone is produced by a part of the brain called the anterior pituitary. Throughout most of the menstrual cycle, LH levels remain relatively low.
How to detect the LH surge?
Recognizing and monitoring the LH surge is crucial when trying to conceive to increase your chances of conception. The most effective method for tracking your LH surge is to monitor your ovulation, determining the beginning and end of your cycle. You can use a calendar or a dedicated app to track and estimate when the LH surge might occur. It may take several cycles to become familiar with this process, so patience and consistency in your efforts are important.
Is an LH surge necessary for conception?
In short, yes, you need an LH surge to have ovulation and get pregnant. However, some women may have difficulty recognizing their LH surge as it can be relatively short. Monitoring your LH surge accurately is crucial to determine your fertile window and increase your chances of successful conception.