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.
Ovulation Tests. Some ovulation tests may be done at home, such as 1  : Ovulation predictor kits (OPK) â the LH surge can be tested at home by means of ovulation kits which measure the hormone level in the urine.