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A B C D E F G H I K L M N O P R S T U V W Y Z

A negative feedback system is any circuit that leads to the suppression of one of its components or of the global state. In many systems, negative feedback serves an adaptive advantage to achieve balance/homeostasis. Some examples of negative feedback systems in the human body are temperature and blood sugar regulation.

Neo-oogenesis is the production of new oocytes throughout the lifetime of an organism. Neo-oogenesis commonly occurs in lower vertebrates (amphibians and reptiles), but is thought not to occur in higher vertebrates, especially mammals.

The term neonatal refers to the period of time from birth to 28 days of life.

Neural tube defects (NTDs) are birth defects of the brain, spine, and spinal cord that usually occur during the first month or trimester of pregnancy, often before a woman realizes she is pregnant. This is why women of childbearing age are advised to take a multivitamin with 400 micrograms of folic acid a day, as this is proven to help prevent NTDs.

Night sweats are episodes of excessive nighttime perspiration that can interfere with sleep.

NTD