TY  - JOUR
T1  - ON the diagnosis of pregnancy in the early months
Y1  - 1989/06/16
N1  - 10.1001/jama.1989.03420230122040
JO  - JAMA
SP  - 3468
EP  - 3468
VL  - 261
IS  - 23
N2  - 
SN  - 0098-7484
M3  - doi: 10.1001/jama.1989.03420230122040
UR  - http://dx.doi.org/10.1001/jama.1989.03420230122040
ER  -