• Paul Lyons
Part of the Current Clinical Practice book series (CCP)


  1. 1.

    The menstrual cycle can be considered a comprehensive physiological adaptation for potential pregnancy.

  2. 2.

    Normal menstrual cycles last 21–45 days (average 28 days), counted from the first day of menstrual bleeding.

  3. 3.

    Physiological adaptations of pregnancy affect most major organ systems including cardiac, renal, gastrointestinal, and endocrine systems.



Luteinizing Hormone Menstrual Cycle Corpus Luteum Luteinizing Hormone Level Luteal Cell 
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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Paul Lyons
    • 1
  1. 1.Department of Family MedicineUniversity of California, RiversideRiversideUSA

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