@article{doi:10.1001/jama.1989.03420230122040,
title = {ON the diagnosis of pregnancy in the early months},
journal = {JAMA},
volume = {261},
number = {23},
pages = {3468},
year = {1989},
doi = {10.1001/jama.1989.03420230122040},
URL = { + http://dx.doi.org/10.1001/jama.1989.03420230122040},
eprint = {/data/Journals/JAMA/9170/jama_261_23_040.pdf}
}