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Pelvic Anatomy & Physiology (Vasculature (Uterine Artery o Arises…

- - - - Uterine Segments
        
        Proportions
        
        Multiparous- body 2x the cervix
        
        Nulliparous menarche- body and cervix equal
        
        Pre-menarche- Uterine body is approx. ½ length of the cervix
        
        Cervix-between isthmus and vaginal canal
        Internal and external os
        
        Isthmus- between body and cervix
        
        Body (corpus)- mid section- muscular tissue
        
        Fundus- the most superior portion
      - Normal dimensions for adult-nulliparous:
        Length 6-8cm
        Width 3-5cm
        AP 3-5cm
      - Normal dimensions for children:
        
        Length 2.5cm
        
        Width 2cm
        
        AP 1cm
      - ***Normal dimensions for adult-multiparous:*** Increases by 1-2 cm
      - Normal dimensions for post menopausal females:
        
        Length 3.5-5.5cm
        
        Width 2-3cm
    - - Myometrium
        middle, muscular layer, responsible for contraction actions of the uterus
      - Serous
        outer layer. Also referred to as the perimetrium
      - Endometrium
        central canal lined by this mucous membrane, sheds during menses
    - - Normal Variants:
        o Anteverted- most common position- fundus and body are bent forward towards cervix
        o Anteflexed- body and fundus are curved forward upon the cervix
        o Retroverted- entire uterus tilted posteriorly
        o Retroflexed- body and fundus are bent backwards towards the cervix