Figure 1. Viable intrauterine gestation and a solid mass in the right adnexa; suspected ectopic pregnancy. J Obstet Gynaecol Downloaded from informahealthcare.com by Chinese University of Hong Kong on 02/20/15 For personal use only.
For a sensitivity of 90%, the fetal heart should be auscultated after 13 week gestation. If a sensitivity of 80% is acceptable the fetal heart can be auscultated after 12 + 1 week gestation.
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