menstruation

(noun)

the periodic discharging of the menses, the flow of blood and cells from the lining of the uterus in females of humans and other primates

Related Terms

  • estradiol
  • menopause
  • corpus luteum
  • endometrium

Examples of menstruation in the following topics:

  • Uterine (Menstrual) Cycle

    • During menstruation, the body begins to prepare for ovulation again.
    • These hormone drops cause the uterus to shed its lining and the egg in a process termed menstruation.
    • High estrogen and progesterone levels stimulate increased endometrial thickness, but following their decline from a lack of implantation, the endometrium is shed and menstruation occurs.
  • Endometriosis

    • In addition to pain during menstruation, the pain of endometriosis can occur at any time of the menstrual cycle.
    • The most intense pain is usually during menstruation which causes dread in women.
  • Periodic Abstinence

    • Most menstrual cycles have several days at the beginning that are infertile (pre-ovulatory infertility), a period of fertility, and then several days just before the next menstruation that are infertile (post-ovulatory infertility).
    • Finally, calendar-based methods assume that all bleeding is true menstruation.
    • Incorrectly identifying bleeding as menstruation will cause the method's calculations to be incorrect.
  • Acne

    • Enlargement of sebaceous glands and an increase in sebum production occur with increased androgen production during puberty and directly before menstruation.
  • Infertility

    • Inadequate nutrition, especially starvation, can delay menstruation.
  • Implantation

    • The syncytiotrophoblast also produces human chorionic gonadotropin (hCG), a hormone that "notifies" the mother's body that she is pregnant, preventing menstruation by sustaining the function of the progesterone-producing corpus luteum within the ovary.
  • Anatomy of the Female Reproductive System

    • If not fertilized, this egg is flushed out of the system through menstruation.
  • Premenstrual Syndrome and Premenstrual Dysphoric Disorder

    • Two to 10% of women have significant premenstrual symptoms that are separate from the normal discomfort associated with menstruation in healthy women.
    • Symptoms begin in the late luteal phase of the menstrual cycle (after ovulation) and end shortly after menstruation begins.
  • Female Athlete Triad: Disordered Eating, Amenorrhea, and Premature Osteoporosis

    • Female athlete triad is a combination of eating disorders, disrupted menstruation, and low bone density.
  • Ovarian Cycle

    • However, some sources use a different set of phases: menstruation, proliferative phase, and secretory phase.
    • Continued drops in levels of estrogen and progesterone trigger the end of the luteal phase, menstruation and the beginning of the next cycle.
Subjects
  • Accounting
  • Algebra
  • Art History
  • Biology
  • Business
  • Calculus
  • Chemistry
  • Communications
  • Economics
  • Finance
  • Management
  • Marketing
  • Microbiology
  • Physics
  • Physiology
  • Political Science
  • Psychology
  • Sociology
  • Statistics
  • U.S. History
  • World History
  • Writing

Except where noted, content and user contributions on this site are licensed under CC BY-SA 4.0 with attribution required.