What time of day should I take an ovulation test?
It is recommended to take an ovulation test between 10 AM to 8 PM as the LH surge in the body usually occurs in the early morning and it can take several hours for the hormone to appear in your urine.
More importantly, take a test at regular times every day to minimize the chance of missing LH surge detection. Also, please use concentrated urine. In other words, make sure you haven't taken in a lot of fluids the 2 hours prior to testing.
When to have sex to get pregnant?
Once an egg is released, it has 24 hours to get fertilized before it dissolves. However, sperm can live for up to 5 days inside a woman. From 5 days before ovulation through the day of ovulation is the Fertile Window. According to Dr. Wilcox, the likely hood of conceiving is distributed for a total of 6 days including the ovulation day. You can increase your chances of getting pregnant if you have more than one relationship during this six-day period. SmileReader tells you two or three days with the most likely to be pregnant with a smiling baby. If you are planning on getting pregnant, do not miss the day when you see and heard the smiley baby!
Source: Wilcox, AJ, et al., 1995, "Timing of sexual intercourse in relation to ovulation-effects on the probability of conception, survival of the pregnancy, and sex of the baby, "NEJM, 333 (23)
Why my LH goes up and down, and up?
Basically, LH levels are in low or mid-range during most of your cycle. According to Dr. Direito, the pattern of increase and decrease in LH varies from person to person. In addition, the results of the test are also affected by the individual's test method and urination. Therefore, slight fluctuations in the low to mid-level can occur and it does not have any significant meanings. However, when the ovulation day is coming, the LH level suddenly will rise. That's why we call it LH surge. It does not necessarily mean that your LH level is gradually increasing. Therefore, we recommend that you take the test at the same time every day to keep the test interval constant.
The LH peak is usually maintained for 1 to 3 days. Depending on the individual, the peak may disappear within a few hours or it may last for more than 5 days. If the time to maintain the LH peak is too short, you may not be able to see a positive result if it does not fit well with the test time. If this is the case, it is a good idea to test it twice a day. If you do not get a peak even after weeks of steady testing, you may have a wrong test method, or you may have taken too much of your drink to get your urine diluted. Finally, we recommend that you consult a doctor if you don't get pregnant even after using the ovulation test for a long time. Smilereader help you get pregnant faster!
Source: Direito. Variability of the LH surge. Fertil Steril 2013.