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.
However, there are a few words of caution when it comes to ovulation tests: 1  While ovulation tests detect a surge in the LH hormone, they cannot confirm whether ovulation actually takes place a day or two later. 2  Ovulation tests are only accurate when taken around ovulation.