Research Article

Noninvasive Ultrasound Monitoring of Embryonic and Fetal Development in Chinchilla lanigera to Predict Gestational Age: Preliminary Evaluation of This Species as a Novel Animal Model of Human Pregnancy

Figure 2

Images of a chinchilla embryo at embryonic day 31 (E31). HFUS B-mode: (a) the umbilical cord (arrow) is evident; (b) measurement of the crown-rump length (CRL) (double-headed arrow) (3.34 mm). US B-mode: (c) image of the embryo (e) and the gestational sac diameter (GSD) (16 mm); (d) measurement of the CRL (6 mm).
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