What is the term for painful menstruation?

Dysmenorrhea is the medical term for painful menstruation. It is a common gynecological complaint, with prevalence rates ranging from 45% to 95% among menstruating women. The pain, typically cramping, is caused by the release of prostaglandins in the uterus, which trigger uterine contractions. Dysmenorrhea is categorized into two types: primary dysmenorrhea, which has no underlying pathology, and secondary dysmenorrhea, which is caused by an underlying pelvic condition.

Rationale for correct answers

C. Dysmenorrhea is the correct medical term for painful menstruation. The pain is primarily caused by uterine contractions mediated by prostaglandins released during the menstrual period. This is a very common condition, and the pain can range from mild to severe, sometimes interfering with daily activities.

Rationale for incorrect answers

A. Amenorrhea refers to the absence of menstruation. It is defined as a lack of menstruation for at least 3 consecutive cycles in a woman who has previously menstruated (secondary amenorrhea) or the failure to start menstruating by age 15 (primary amenorrhea). It is a distinct condition from painful menstruation.

B. Oligomenorrhea refers to infrequent or light menstruation, characterized by menstrual cycles that are longer than 35 days. This condition is often associated with anovulation and can be caused by hormonal imbalances. It describes the frequency of periods, not the presence of pain during them.

D. Menorrhagia refers to abnormally heavy or prolonged menstrual bleeding, which is defined as a blood loss of more than 80 mL or a duration of more than 7 days. While menorrhagia can be associated with pain (dysmenorrhea), the term itself specifically describes the volume and duration of bleeding, not the pain.

Take home points

• Dysmenorrhea is the medical term for painful menstruation.
• Primary dysmenorrhea has no underlying cause.
• Secondary dysmenorrhea is due to an underlying condition like endometriosis.
• Other terms like amenorrhea, oligomenorrhea, and menorrhagia describe different menstrual cycle abnormalities.

Ovulation is the process where a mature ovum is released from the dominant follicle into the fallopian tube. It is triggered by the luteinizing hormone (LH) surge and typically occurs around day 14 of a 28-day cycle. This event is a critical component of female fertility. Associated physical signs are a result of hormonal fluctuations, primarily the peak in estrogen leading to the LH surge. These signs can be tracked to help predict the timing of ovulation.

Rationale for correct answers

B. Mittelschmerz, a German term meaning "middle pain," is a physical sign commonly associated with ovulation. It is a one-sided lower abdominal or pelvic pain that can occur just before, during, or after ovulation. The pain is believed to be caused by the swelling of the dominant follicle before rupture, or by the irritation of the peritoneal lining from the fluid and blood released during follicular rupture.

Rationale for incorrect answers

A. A decrease in basal body temperature (BBT) is not associated with ovulation. In fact, BBT remains low during the follicular phase, and then rises by approximately 0.5 to 1.0°F (0.3 to 0.6°C) after ovulation. This temperature increase is due to the thermogenic effects of progesterone, which is produced by the corpus luteum in the luteal phase. Therefore, a rise, not a decrease, in BBT is the correct physical sign.

C. Cervical mucus does change during ovulation, but the change is not a generalized thickening. Under the influence of rising estrogen, cervical mucus becomes thin, clear, and stretchy, resembling raw egg whites. This "fertile" mucus, known as EWM (egg white mucus), facilitates the movement of sperm through the cervix and into the uterus. After ovulation, progesterone causes the mucus to become thick and opaque.

D. Endometrial shedding is the process of menstruation, which is the beginning of the menstrual cycle, not an event of ovulation. Ovulation occurs mid-cycle, following the follicular phase where the uterine lining (endometrium) has thickened. Endometrial shedding is the result of the breakdown of the uterine lining due to a drop in progesterone and estrogen levels when pregnancy does not occur.

Take home points

• Ovulation can be accompanied by a one-sided pelvic pain called mittelschmerz.
• Basal body temperature rises after ovulation.
• Cervical mucus becomes thin and stretchy, like egg whites, during ovulation.
• Endometrial shedding is menstruation, which marks the start of a new cycle.