If you have been trying to conceive with no success, it could just be that you’re missing the ovulation fertile window, which is around 4days. The ideal time for intercourse would be 1-3 days prior to ovulation.
Don't rely entirely on ovulation tests to detect it. They often aren't so accurate as they only detect an increase in LH, but that doesn’t mean ovulation is occurring exactly on those days.
Finding an effective way to understand when you are actually ovulating is crucial when TTC!!
The best method to detect ovulation is MEASURING BASAL BODY TEMPERATURE which is your waking temperature.
You can get a basal thermometer at a chemist; it is a special thermometer that shows the minute degree changes that a regular thermometer can not.
The temperature should be taken 1st thing in the morning around the same time and before getting out of bed.
When ovulation occurs, the BBT slightly increases (from about 46.3 to 36.7 degrees Celsius).
The most fertile day is the day of the spike and the couple of days preceding it. Just be aware that false spike may occur due to hangovers, stress, illness and travel which will all cause a delay ovulation.
You can download a free BBT chart here.
If you tend to wake up in the middle of the night or are afraid you won't be able to take the temperature at the exact same time everyday, try OVUSENSE. This is a medical device, an electronic thermometer which can alert you up to 24-hours before you ovulate based on your in-cycle data. Clinically proven to be correct 96% of the time, this gives you more time to try to get pregnant each cycle.
Charting the BBT will last help you to understand how long the pre/post ovulation period last to have a clearer idea of what's going on and whether there is a progesterone deficiency which is obstbacoling your success.
When progesterone is too low after ovulation, this may result in spotting and lower success rates of implantation of a fertilised egg. If you notice that, no worries, as there are remedies you can try in order to improve it; but it is very important you become aware of it first.
Another helpful method is the CERVICAL MUCUS METHOD.
You can learn how to check your cervical mucus to get a better idea whether you should be in your fertile phase of the cycle. Usually straight after menstruation the mucus is scant, sticky and thick, impenetrable to sperm.
As ovulation approaches, the mucus becomes more clear, slippery; it has the consistency of raw egg and should stretch between your fingers. The most fertile day is the last day of egg white cervical mucus.