Expectant management of early pregnancies of unknown location: a prospective evaluation of methods to predict spontaneous resolution of pregnancy

Hahlin, 1991, Combined use of progesterone and human chorionic gonadotropin determinations for differential diagnosis of very early pregnancy, Fertil Steril, 55, 492, 10.1016/S0015-0282(16)54173-9 Stovall, 1989, Preventing ruptured ectopic pregnancy with single serum progesterone, Am J Obstet Gynecol, 160, 1425, 10.1016/0002-9378(89)90866-1 Stovall, 1993, Ectopic pregnancy Diagnostic and therapeutic algorithms minimizing surgical intervention, J Reprod Med, 38, 807 Cacciatore, 1989, Comparison of abdominal and vaginal sonography in suspected ectopic pregnancy, Obstet Gynecol, 73, 770 Fossum, 1988, Early detection of pregnancy with transvaginal US, Fertil Steril, 49, 788, 10.1016/S0015-0282(16)59884-7 Nyberg, 1986, Threatened abortion: sonographic distinction of normal and abnormal gestation sacs, Radiology, 158, 397, 10.1148/radiology.158.2.3510445 Hahlin, 1995, The expectant management of early pregnancies of uncertain site, Hum Reprod, 10, 1223, 10.1093/oxfordjournals.humrep.a136123 Cacciatore, 1988, Suspected ectopic pregnancy: ultrasound findings and hCG levels assessed by an immunofluorometric assay, Br J Obstet Gynecol, 95, 497, 10.1111/j.1471-0528.1988.tb12804.x Banerjee, 1999, The expectant management of women with early pregnancies of unknown location, Ultrasound Obstet Gynecol, 16, 231, 10.1046/j.1469-0705.1999.14040231.x Hanley, 1983, A method of comparing the areas under the receiver operating characteristics curves derived from the same cases, Radiology, 148, 839, 10.1148/radiology.148.3.6878708 Ankum, 1996, Risk factors for ectopic pregnancy: a meta-analysis, Fertil Steril, 65, 1093, 10.1016/S0015-0282(16)58320-4 Stovall, 1992, Serum progesterone and uterine curettage in differential diagnosis of ectopic pregnancy, Fertil Steril, 57, 456, 10.1016/S0015-0282(16)54866-3 Carson, 1993, Ectopic Pregnancy, N Engl J Med, 329, 1174, 10.1056/NEJM199310143291608 Lindahl, 1986, Identification of chorion villi in abortion specimens, Obstet Gynecol, 67, 79 Barnea, 1986, Progesterone, estradiol and α-human chorionic gonadotrophin secretion in patients with ectopic pregnancy, J Clin Endocrinol Metab, 62, 529, 10.1210/jcem-62-3-529 Hahlin, 1990, Single progesterone assay for early recognition of abnormal pregnancy, Hum Reprod, 6, 622, 10.1093/oxfordjournals.humrep.a137157 Matthews, 1986, Serum progesterone levels as an aid in the diagnosis of ectopic pregnancy, Obstet Gynecol, 68, 390, 10.1097/00006250-198609000-00021 McCord, 1997, Single serum progesterone as a screen for ectopic pregnancy: exchanging specificity and sensitivity to obtain optimal test performance, Fertil Steril, 67, 980 Milwidsky, 1984, Corpus luteum function in ectopic pregnancy, Int J Fertil, 2, 244 Radwanska, 1978, Plasma progesterone levels in normal and abnormal early human pregnancy, Fertil Steril, 30, 398, 10.1016/S0015-0282(16)43571-5 Yeko, 1987, Timely diagnosis of early ectopic pregnancy using a single blood progesterone measurement, Fertil Steril, 48, 1048, 10.1016/S0015-0282(16)59607-1 Shepherd, 1990, Serial β-HCG measurements in the early detection of ectopic pregnancy, Obstet Gynecol, 75, 417 Cacciatore, 1990, Diagnosis of ectopic pregnancy by vaginal ultrasonography in combination with a discriminatory serum hCG level of 1000IU/L (IRP), Br J Obstet Gynaecol, 97, 904, 10.1111/j.1471-0528.1990.tb02445.x Braunstein, 1976, Serum human chorionic gonadotrophin levels throughout normal pregnancy, Am J Obstet Gynecol, 126, 678, 10.1016/0002-9378(76)90518-4 Daya, 1987, Human chorionic gonadotropin increase in normal early pregnancy, Am J Obstet Gynecol., 156, 286, 10.1016/0002-9378(87)90269-9 Lindblom, 1989, Serial human chorionic gonadotropin determinations by fluorimmunoassay for the differentiation between intrauterine and ectopic gestation, Am J Obstet. Gynecol, 161, 397, 10.1016/0002-9378(89)90530-9