Page Content. Clinical research aims to advance medical knowledge by studying people, either through direct interaction or through the collection and analysis of blood, tissues, or other samples. A clinical trial is one type of clinical research that follows a pre-defined plan or protocol.
The female reproductive system interacts with many other systems in the body. The most common is the endocrine system. The reproductive system relies on the endocrine system to produce hormones such as progesterone and estrogen, that help with the blood lining of the uterus and prepare the uterus for pregnancy.
What the Male Reproductive System Does. The male sex organs work together to produce and release semen into the reproductive system of the female during sexual intercourse. The male reproductive system also produces sex hormones, which help a boy develop into a sexually mature man during puberty.