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. Author manuscript; available in PMC: 2020 Jul 13.
Published in final edited form as: Semin Perinatol. 2017 Sep 27;41(8):485–492. doi: 10.1053/j.semperi.2017.08.007

Fig. 3 –

Fig. 3 –

Finite element tissue stretch over ranges of fetal membrane stiffness. Stiffness is prescribed to 1/5 of physiological stiffness (left), experimentally derived physiological stiffness (center), and 5 times physiological stiffness (right). Numerical values represent volume percentages of cervix internal os over a 1.25 stretch threshold. Increasing fetal membrane stiffness reduces tissue stretch at the internal os.