Lh surge how long fertile

If there are no complications affecting fertility, having sex several times within the fertile period may be enough to conceive. The LH surge begins around 36 hours before ovulation. Once the egg is released, it survives for about 24 hours, after which time the fertile window is over.

Because the period of fertility is so short, it is important to keep track of it when trying to conceive, and noting the timing of the LH surge can help. It is best to start testing levels when the fertile window is drawing near, or a handful of days before ovulation.

Most people ovulate between 7 and 19 days before their next period begins. People with shorter cycles should test earlier in the range of likely days. A person can buy an OPK without a prescription, from drug stores or online. Many brands are available. A positive result means that a person has a high amount of LH in their system. LH levels drop after ovulation, so the tests only show positive results during fertile periods.

Because each kit is different, it is important to follow the instructions carefully. All tests are relatively simple to use. If OPKs are unlikely to be effective, a person can ask their doctor for a blood test. It may take a few tests to identify the fertile period and to pinpoint the time of ovulation.

A doctor can also identify the fertile period by examining the ovaries on a transvaginal ultrasound scan. For women trying to get pregnant, it is important to track the window of fertility and the LH surge. A doctor can help to decide which method of tracking will be most effective.

Whether you want to get pregnant or prevent pregnancy, there are many fertility apps on the market to fit your needs. Most signs of ovulation are driven by the hormone estrogen. Estrogen levels begin to rise roughly 5 days before ovulation. Rising estrogen levels cause your vaginal discharge also known as cervical mucus to increase and become more slippery.

This is one of the best indicators that ovulation is approaching. Once estrogen reaches a certain threshold, this triggers the release of LH. This means that you should notice increased fertile vaginal discharge around the time of the LH surge. But the discharge is a symptom of increased estrogen levels, not LH. Not necessarily.

Think of the LH surge as a sign that your body is preparing for ovulation. Ovulation usually will follow the LH surge, but having an LH surge is not a guarantee that ovulation will occur. To confirm that ovulation occurred, you would need to observe an increase in basal body temperature , or have your progesterone levels checked by your doctor. It can also occasionally happen to women with otherwise normal cycles. In normal menstrual cycles, the ruptured follicle becomes a corpus luteum, which releases progesterone and stimulates the lining of the uterus to build up.

But with LUF, even though the follicle never ruptures, it still releases progesterone. In fact, the only way to detect LUF is via ultrasound. Often, there is no apparent cause for LUF.

But it is known that long term use of anti-inflammatory drugs can prevent the follicle from bursting, sometimes leading to LUF. Since normal LH levels vary between women, another way of defining the LH surge is the first day of your cycle when LH concentration is three times the concentration of the six previous days.

Relationships between the luteinizing hormone surge and other characteristics of the menstrual cycle in normally ovulating women. Timing is crucial: Some critical thoughts on using LH tests to determine women's current fertility.

Chronological aspects of ultrasonic, hormonal, and other indirect indices of ovulation. I am interested in Ava for personal use.

Location preferences Close. Progesterone is a hormone needed to support a potential pregnancy. Your LH surge is important because it initiates the beginning of ovulation and your fertile period.

After that, your fertile window is over. This makes it very important to be able to identify this best time to conceive. These are readily available online and in most pharmacies. These kits are similar to pregnancy tests because they measure hormone levels in your urine. Each kit is a little different in how they register a positive result, so make sure to check the instructions.

A positive result indicates the presence of a high amount of LH, or your LH surge. The tests can be expensive to use that frequently. Ovulation usually occurs about 14 days before your period.

Your LH surge occurs a day or two before that. So knowing how long your cycle is from one period to the next will help you figure out when to start testing.

Day one of the cycle is the first day of your period. Ovulation most likely occurs around day You should get a positive result on an OPK a day or two before that, on day 16 or This is to make sure that you catch the positive result, in case you have a shorter cycle that month. Most experts recommend having sex two to three times over the next 24 to 48 hours.

If you have trouble using an OPK, you can ask your doctor to run some blood tests to help you pinpoint your ovulation. Usually, a gynecologist or reproductive endocrinologist infertility specialist can help you interpret the blood testing results. You may need to have a few blood tests to determine your fertile period.

Some doctors may also recommend a transvaginal ultrasound. This allows your doctor to look at your ovaries and see how the follicles are growing.

Using an OPK can be a very effective way to help you become pregnant. If you get a consistently positive result, or you never get a positive one, visit your doctor to rule out other medical conditions.