Understanding what an endocrinologist does begins with understanding what the endocrine system is. The endocrine system is a series of glands that produce and secrete hormones that the body uses for a wide range of functions. These control many different bodily functions, including: 1  Respiration.
Most ovulation tests may be used at any time of the day; some suggest testing first thing in the morning, although this is not required. For greater success, test about the same time each day, and reduce your liquid intake for four hours beforehand.
Overall, if you test for five days you have an 80 percent chance of predicting ovulation, and if you test for 10 days, you have a 95 percent chance of predicting ovulation. Saliva testing can also be used to detect ovulation, and relative to ovulation test kits, this method can be much less expensive.