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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: Ultrasound Med Biol. 2015 Aug 8;41(11):3023–3029. doi: 10.1016/j.ultrasmedbio.2015.06.014

Figure 2.

Figure 2

Figure 2

a. Attenuation coefficient over the course of pregnancy for 68 African-American women by birth outcome (full term, medically indicated preterm and spontaneous preterm). Error bars are SEM.

Figure 2. b. Cervical length over the course of pregnancy for 67 African-American women by birth outcome (full term, medically indicated preterm and spontaneous preterm). Error bars are SEM.