Metronidazole: The most common medicine used to treat trichomoniasis. It is also used to treat bacterial vaginosis. A common brand name for this medicine is Flagyl.
Microsurgery: Surgery utilizing a microscope to enable doctors to operate on very small areas. Microsurgery is used to target a specific area and to protect as much of the surrounding healthy tissue as possible.
Mittelschmerz: The pelvic pain that some women experience during ovulation. (Ovulation generally occurs about mid way between menstrual cycles; hence the term mittelschmerz, which comes from the German words for "middle" and "pain.")
Monogamy: The practice of having sex with only one partner.
Neoplasm: An abnormal mass or colony of cells.
Nocturnal penile tumescence and rigidity testing: A test used to monitor erections that occur naturally during sleep. This test can help determine if a man's erectile problems are due to physical or psychological causes.
Non-coital behavior: Physically stimulating activity that does not include intercourse (such as sensual massage).
Non-infectious vaginitis: A form of vaginitis (irritation or inflammation of the vagina) that may result as a reaction to certain substances or chemicals, such as vaginal sprays, douches, spermicides, soap, laundry detergent, or fabric softener.
Non-seminoma: A type of testicular cancer that tends to be aggressive and occurs most often when men are in their 30s or younger. There are four types of non-seminomas: embryonal carcinomas, yolk sac tumors, teratomas, and choriocarcinomas. When these non-seminomas occur in combination, they are called mixed tumors.
Norplant: Six match-sized rubber capsules that are surgically implanted underneath the skin of a woman's upper arm. The sticks contain the hormone progestin, which releases slowly into the body and prevents pregnancy for up to five years. Norplant is no longer available in the U.S.
Omentectomy: The surgical removal of the fatty tissue covering within the abdomen.
Oncologist: A doctor who specializes in cancer treatment.
Oophorectomy: A surgical procedure in which one or both of the ovaries is removed.
Orchiectomy: A surgical procedure in which the doctor removes one or both testicles through an incision (cut) in the groin.