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.
Try our ovulation calculator to help you work out when your fertile window is likely to be. Some women use ovulation kits to pinpoint their most fertile time. Most of these kits test for the peak of luteinising hormone, or LH, which is the actual trigger for egg release.