Negative betahCG: positive ectopic pregnancy.
Emergency Department, Auckland Hospital, Auckland, New Zealand.
Adrian
A
Skinner
Peter
P
Jones
D000006:Abdomen, Acute / Q000209:etiology; D000328:Adult; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000097:blood* / Q000175:diagnosis*
D018997:Chorionic Gonadotropin, beta Subunit, Human