title: Reversibility of pregnancy-induced changes in the superficial veins of the lower extremities.
abstract: OBJECTIVE
  To determine the change in long saphenous vein (LSV) area in early pregnancy and the reversal postpartum in comparison with non-pregnant control values.
  
  
  METHODS
  Ultrasonography was used to determine the LSV areas at four different levels in the right and left legs of women in an erect position. The measurements from 69 nulliparous women were used to determine the non-pregnant baseline measurements for vein area. The vein areas were similarly measured from 39 primigravida women in early pregnancy and postpartum.
  
  
  RESULTS
  There was no significant difference found between measurements obtained from the right and the left legs. Non-pregnant baseline measurements were less than either the early pregnancy, or postpartum measurements obtained from the primigravida women.
  
  
  CONCLUSIONS
  Physiological changes associated with early pregnancy induce dilation of the LSV, and the reversal postpartum is not complete with vein areas statistically larger than in the non-pregnant state.
authors.affiliation: School of Physical and Chemical Science, Queensland University of Technology, George Street, Brisbane, Australia. l.pemble@griffith.edu.au
authors.forename: L
authors.initials: L
authors.lastname: Pemble
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D004108:Dilatation, Pathologic; D005260:Female; D006801:Humans; D049590:Postpartum Period; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000000981:diagnostic imaging*; D012075:Remission, Spontaneous; D012501:Saphenous Vein / Q000000981:diagnostic imaging*; D018616:Ultrasonography, Doppler, Duplex; D014648:Varicose Veins / Q000000981:diagnostic imaging*