Third trimester placental grading by ultrasonography as a test of fetal wellbeing:Br Med J (Clin Res Ed) 1987; 295 doi: http://dx.doi.org/10.1136/bmj.295.6596.502-c (Published 22 August 1987) Cite this as: Br Med J (Clin Res Ed) 1987;295:502
Log in using your username and password
Log in through your institution
Register for a free trial to thebmj.com to receive unlimited access to all content on thebmj.com for 14 days.
Sign up for a free trial