Ovulation predictors There are many<unk> s on the market today that can be used for predicting ovulation so that sperm can be introduced into the reproductive tract of a woman at the appropriate time, whether by sexual intercourse, including NI or by artificial insemination. Ovulation is the time of the month when the oocyte, or egg, is released by the woman. This is identified as the most fertile time in a woman's menstrual cycle. Introducing semen into the vaginal cavity during the ovulation time, called 'timing of intercourse' or 'timing of artificial insemination', is important for achieving a pregnancy. Where a donor is being used, timing is particularly important because donor sperm which is supplied by a sperm bank or a fertility clinic is expensive and it is crucial that it be used at the opportune time. Similarly, where a private donor is used, he will usually wish to supply his sperm for artificial insemination or to inseminate using intercourse at the optimum time of the month. One type of ovulation predictor is a saliva tester. To use it a woman spits onto a glass slide to observe when salt crystals are forming to identify when she is ovulating. The saliva salt crystal formation is known as "ferning", due to the visual similarity to a fern plant under the microscope as the saliva dries. This will show an increase in estrogen that is related to ovulation. There are devices that are like wrist watches or patches affixed to sensitive areas of the skin that measure subtle body chemical changes on the surface of the skin to help to identify time of ovulation. Some devices also come with on-line help and support. A commonly used ovulation predictor is the luteinizing hormone (LH) surge urine stick or ovulation predictor stick that helps to identify the time of ovulation. A woman will urinate on an LH surge stick once or twice a day, starting a few days before suspected ovulation. Often the stick will show two lines indicating that ovulation is 24–36 hours away. Basal thermometer A basal thermometer is an ultra sensitive thermometer that tracks the body's minutest temperature shift. A basal body temperature (BBT) thermometer is often used by women to chart their basal body temperature chart and hence to predict their fertile period or ovulation. A basal thermometer is more reliable and accurate than a simple glass thermometer since glass thermometers are only accurate to .2 degrees Fahrenheit whereas a basal thermometer is generally accurate to .1 degrees Fahrenheit. The basal thermometer is used to chart a woman's fertile time of the month and is used in connection with a chart. The chart should show low temperatures before ovulation in the follicular phase, and higher ones after ovulation in the luteal phase. Using a basal thermometer in connection with a chart over several months should show the best times when<unk>  can take place and enable the planning of intercourse or artificial insemination. However, times may vary slightly each month so that the user will need to check her temperature continually to ensure that she has the most accurate information. For this reason, some women prefer to use the basal thermometer in conjunction with other methods to ensure complete accuracy.
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Tactile graphic
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Condom machine