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. Author manuscript; available in PMC: 2009 May 12.
Published in final edited form as: Am J Obstet Gynecol. 2007 Jul;197(1):52.e1–52.e7. doi: 10.1016/j.ajog.2007.04.026

Figure 6. Effect of bag volume and pelvic floor contraction on the vaginal HPZ.

Figure 6

note a reduction in the AP but not the lateral dimension of the bag with pelvic floor contraction with each bag volume. The bag volumes that resulted in the opening of the vaginal HPZ revealed a consistent decrease in the AP length of the vaginal bag with each contraction but there was no effect on the lateral dimension of the vaginal bag (*, p<0.05).