Vapor Fahr. Reproduced with permission of American Society of Mechanical Engineers. The ASME Steam Tables, 1967 edition, is no longer in print. new industrial formulation of the properties of water and steam was created by the International Association for Properties of Water and Steam.
A common misconception with ovulation tests is that they tell you specifically when you are ovulating, which sadly isnât true. Ovulation predictor kits actually work by testing for the luteinizing hormone (LH) which is the indicator of your body preparing to release a matured egg.
This is where ovulation predictor kits (OPKs) can help. An OPK is a quick, easy and accurate way to predict ovulation in advance. It allows you to pinpoint your fertile window from the very first month. Kits are available online, at some chemists or medical stores that also stock pregnancy test kits. Urine-based OPKs test your urine for an increase (surge) in luteinising hormone (LH). This happens one day to two days before ovulation. A small amount of LH is always present in your blood and urine.