ABSTRACT
FIGURE 2 ■ A 4.8-week menstrual age embryo. The gestational sac is embedded superior to the endometrial stripe (arrows).
therefore, be a more accurate way to assess growth and indirectly determine menstrual age in the third trimester (9). Finally, the variability of any fetal measurement increases with advancing gestational age. Hence, the range of a sonographic assessment of menstrual age should be reported.
