Biochemical diagnosis of ectopic pregnancy

References

• Ahmed A. G., Klopper A. Separation of two pregnancy-associated proteins with SP-1 determinants and the conversion of SP-1 beta to SP-1 alpha. Arch. Gynecol. 1980; 230: 95
   PubMedGoogle Scholar
• Anon. Unanswered questions on ectopic pregnancy. Br. Med. J. 1980; 280: 1127
   PubMed Web of Science ®Google Scholar
• Anthony F., Spencer K., Mason P., Masson G. M., Price C. P., Wood P. J. The variable influence of an α component in pregnancy plasma on four different assay systems for the measurement of pregnancy-specific β1 glycoprotein. Clin. Chim. Acta 1980; 105: 287
   PubMed Web of Science ®Google Scholar
• Ayala A. R., Nisula B. C., Chen H.-C., Hodgen G.-D., Ross G. T. Highly sensitive radioimmunoassay for chorionic gonadotropin in human urine. J. clin. Endocrinol. Metab. 1978; 47: 767
   PubMed Web of Science ®Google Scholar
• Beaven M. A., Marshall J. R., Baylin S. B., Sjoerdsma A. Changes in plasma histaminase activity during normal early human pregnancy and pregnancy disorders. Am. J. Obstet. Gynecol. 1975; 123: 605
   PubMed Web of Science ®Google Scholar
• Bohn H. Pregnancy-specific β-globulin SP1. Scand. J. Immunol. 1978; 7: 119
   Google Scholar
• Bohn H. New placental and pregnancy proteins as possible markers in oncology. Klin. Wochenschr. 1980; 58: 489
   PubMedGoogle Scholar
• Bohn H., Chard T., Grudzinskas J. G., Klopper A., Rosen S., Schultz-Larsen P., Seppala M., Sizaret P., Tatarinow Y. S., Teisner B. Reference preparation for assay of some pregnancy and cancer associated proteins. Lancet 1980; ii: 796
   Google Scholar
• Boyko W. L., Barrett B. Detection and quantitation of the β-subunit of human chorionic gonadotropin in serum by radioimmunoassay. Fertil. Steril. 1980; 33: 141
   PubMed Web of Science ®Google Scholar
• Braunstein G. D., Karow W. G., Gentry W. C., Rasor J., Wade M. E. First-trimester chorionic gonadotropin measurements as an aid in the diagnosis of early pregnancy disorders. Am. J. Obstet. Gynecol. 1978; 131: 25
   PubMed Web of Science ®Google Scholar
• Braunstein G. D., Karow W. G., Gentry W. D., Wade M. E. Subclinical spontaneous abortion. Obstet. Gynecol. 1977; 50: 41s, suppl.
   PubMed Web of Science ®Google Scholar
• Braunstein G. D., Rasor J., Adler D., Danzer H., Wade M. E. Serum human chorionic gonadotropin levels throughout normal pregnancy. Am. J. Obstet. Gynecol. 1976; 126: 678
   PubMed Web of Science ®Google Scholar
• Braunstein G. D., Rasor J. L., Engvall E., Wade M. E. Interrelationships of human chorionic gonadotropin, human placental lactogen, and pregnancy-specific β1-glycoprotein throughout normal human gestation. Am. J. Obstet. Gynecol. 1980; 138: 1205
   PubMed Web of Science ®Google Scholar
• Canfield R. E., Ross T. A new reference preparation of human chorionic gonadotrophin and its subunit. Bull. WHO 1976; 54: 463
   PubMed Web of Science ®Google Scholar
• Catt K. J., Dufau M. L., Vaitukaitis J. L. Appearance of hCG in pregnancy plasma following the initiation of implantation of blastocyst. J. clin. Endocrinol. Metab. 1975; 40: 537
   PubMed Web of Science ®Google Scholar
• Dericks-Tan J. S., Taubert H.-D. Radio-immunologischer Schnelltest für HCG bei normaler und gestörter Frühschwangerschaft. Dtsch. Med. Wochenschr. 1979; 104: 1779
   PubMed Web of Science ®Google Scholar
• Dhont M., Serreyn R., Vandekerckhove D., Thiery M. Serum-chorionic gonadotrophin assay and ectopic pregnancy. Lancet 1978; i: 559
   Google Scholar
• Eiermann W., Grenner G., Sterzik K., Dati F. β1-glycoprotein (SP-1) in maternal serum as a diagnostic aid in ectopic pregnancy. La Ricerca Clin. Lab. 1980; 10: 229
   PubMedGoogle Scholar
• Elmfors B., Tryding N. Date of confinement prediction from serum diamine oxidase determination in early pregnancy. Br. J. Obstet. Gynaecol. 1976; 83: 6
   PubMedGoogle Scholar
• Emmrich P., Köpping H. A study of placental villi in extrauterine gestation: a guide to the frequency of blighted ova. Placenta 1981; 2: 63
   PubMed Web of Science ®Google Scholar
• Grenner G. Enzymimmunoassay zur Bestimmung des schwangerschaftsspezifischen β1-Glykoproteins (SP-1). Z. Anal. Chem. 1978; 290: 99
   Google Scholar
• Grudzinskas J. G., Chard T. Why circulating levels of trophoblast-specific proteins may be normal in ectopic pregnancy. Lancet 1979; 1: 933
   PubMed Web of Science ®Google Scholar
• Grudzinskas J. G., Gordon Y. B., Chard T. Assessment of fetal risk during early and late pregnancy using pregnancy specific β1-glycoprotein. Carcino-Embryonic Proteins, F. G. Lehmann. Elsevier/North-Holland, Amsterdam 1979; vol. II: 473
   Google Scholar
• Grudzinskas J. G., Gordon Y. B., Jeffrey D., Chard T. Specific and sensitive determination of pregnancy-specific β1-glycoprotein by radioimmunoassay. Lancet 1977; i: 333
   Google Scholar
• Grudzinskas J. G., Lenton E. A., Gordon Y. B., Kelso I. M., Jeffrey D., Sobowale O., Chard T. Circulating levels of pregnancy-specific β1-glycoprotein in early pregnancy. Br. J. Obst. Gynaecol. 1977; 84: 740
   PubMedGoogle Scholar
• Harrison R. F., Biswas S. Maternal plasma, human placental lactogen, α-fetoprotein, prolactin and growth hormone in early pregnancy. Int. J. Gynaecol. Obstet. 1980; 17: 471
   PubMedGoogle Scholar
• Hatch K. D., Shingleton H. M., Younger B., Boots L. R. Elevated titers of the beta subunit of human chorionic gonadotropin in oophorectomized women being treated for trophoblastic disease. Am. J. Obstet. Gynecol. 1980; 137: 122
   PubMed Web of Science ®Google Scholar
• Hindersson P., Folkersen J., Westergaard J. G., Teisner B., Svehag S.-E. Specific assay for pregnancy-specific-β1-glycoprotein (SP-1-β). Preparation of antiserum specific for SP-1-β by absorption with a crossreacting high molecular weight serum protein. J. Reprod. Immunol. 1979; 1: 159
   PubMed Web of Science ®Google Scholar
• Ho P. C., Jones W. R. Pregnancy-specific β1-glycoprotein as a prognostic indicator in complications of early pregnancy. Am. J. Obstet. Gynecol. 1980; 138: 253
   PubMed Web of Science ®Google Scholar
• Horne C. H.W., Rosen S. W. Human placental and pregnancy proteins. Scand. J. Immunol. 1978; 8(suppl. 8)55
   Google Scholar
• Jouppila P., Tapanainen J., Huhtaniemi J. Plasma hCG and ultrasound in suspected ectopic pregnancy. Eur. J. Obstet. Gynecol. Reprod. Biol. 1980; 10: 3
   PubMed Web of Science ®Google Scholar
• Kadar N., DeVore G., Romero R. Discriminatory hCG zone: its use in the sonographic evaluation for ectopic pregnancy. Obstet. Gynecol. 1981; 58: 156
   PubMed Web of Science ®Google Scholar
• Kauppila A., Rantakylä P., Huhtaniemi I., Ylikorkala O., Seppälä M. Trophoblastic markers in the differential diagnosis of ectopic pregnancy. Obstet. Gynecol. 1980; 55: 560
   PubMed Web of Science ®Google Scholar
• Kikutani M., Ishiguro M., Kitagawa T., Imamura S., Miura S. Enzyme immunoassay of human chorionic gonadotropin employing β-galactosidase as label. J. clin. Endocrinol. Metab. 1978; 47: 980
   PubMed Web of Science ®Google Scholar
• Knox B. S., McKee J. W.A., Hair P. I., France J. T. Determination of β-choriogonadotropin in human plasma: evaluation and comparison of five ‘kit’ methods. Clin. Chem. 1980; 26: 1890
   PubMed Web of Science ®Google Scholar
• Kosasa T., Levesque L., Goldstein D. P., Taymor M. L. Early detection of implantation using radioimmunoassay specific for human chorionic gonadotropin. J. clin. Endocrinol. Metab. 1973; 36: 622
   PubMed Web of Science ®Google Scholar
• Kosasa T. S., Taymor M. L., Goldstein D. P., Levesque L. A. Use of a radioimmunoassay specific for human chorionic gonadotropin in the diagnosis of early ectopic pregnancy. Obstet. Gynecol. 1973; 42: 868
   PubMed Web of Science ®Google Scholar
• Lenton E. A., Grudzinskas G. J., Neal L. M., Chard T., Cooke I. D. Chorionic gonadotropin concentration in early human pregnancy: comparison of specific and nonspecific assays. Fertil. Steril. 1981; 35: 40
   PubMed Web of Science ®Google Scholar
• Lerario A. C., Pierce J. G., Vaitukaiti J. L. Effect of conformation of hCG-β on generation of hCG-specific antibody. Endocrinol. Res. Cotnmun. 1978; 5: 43
   PubMed Web of Science ®Google Scholar
• Lindstedt G., Janson P.-O., Thorburn J. Sensitivity of serum-chorionic gonadotrophin assay for ectopic pregnancy. Lancet 1981; i: 781
   Google Scholar
• Lindstedt G., Lundberg P.-A., Enk L., Redvall L. Serum-chorionic-gonadotrophin in normal and ectopic pregnancy. Lancet 1978; i: 108
   Google Scholar
• Lindstedt G., Lundberg P.-A., Hedman L. A. Circulating choriogonadotrophin β subunit in a patient with primary amenorrhea and embryonal ovarian carcinoma. Clin. Chim. Acta 1980; 104: 195
   PubMed Web of Science ®Google Scholar
• Miller J. F., Williamson E., Glue J., Gordon Y. B., Grudzinskas J. G., Sykes A. Fetal loss after implantation. A prospective study. Lancet 1980; ii: 554
   Google Scholar
• Reproductive Endocrinology, Infertility and Contraception, D. R. Mishell, V. Davajan. F.A. Davis Co., Philadelphia 1979
   Google Scholar
• Mishell D. R., Nakamura R. M., Barberia J. M., Thorneycroft I. H. Initial detection of human chorionic gonadotropin in serum in normal human gestation. Am. J. Obstet. Gynecol. 1974; 118: 990
   PubMed Web of Science ®Google Scholar
• National Committee for Clinical Laboratory Standards. Letter on HCG standardization. Radioligand Assay News 1981; 8: 15
   Google Scholar
• Rasor J. L., Braunstein G. D. A rapid modification of the beta-hCG radioimmunoassay: use as an aid in the diagnosis of ectopic pregnancy. Obstet. Gynecol. 1977; 50: 553
   PubMed Web of Science ®Google Scholar
• Reuter A. M., Schoonbrood J., Franchimont P. Specific radioimmunoassay of HCG and its α and β subunits: methods and results. Cancer Related Antigens, P. Franchimont. North-Holland, Amsterdam 1976; 237
   Google Scholar
• Rosen S. W., Kaminska J., Calvert I. S., Ellmore N., Aaronson S. A. Ectopic production of ‘pregnancy-specific’ beta-1 glycoprotein in vitro: discordance with three other placental proteins. Am. J. Obstet. Gynecol. 1980; 137: 525
   PubMed Web of Science ®Google Scholar
• Rutanen E.-M., Tarjanne H., Huovinen J., Ikonen M. hCG-beta-subunit radioimmunoassay in gynaecological emergencies. Lancet 1980; i: 484
   Google Scholar
• Samuelsson S., Sjövall A. Laparoscopy in suspected ectopic pregnancy. Acta obstet. gynecol. scand. 1972; 51: 31
   PubMed Web of Science ®Google Scholar
• Saxena B. B., Landesman R. The use of a radioreceptorassay of human chorionic gonadotropin for the diagnosis and management of ectopic pregnancy. Fertil. Steril. 1975; 26: 397
   PubMed Web of Science ®Google Scholar
• Saxena B. B., Landesman R. Diagnosis and management of pregnancy by the radioreceptorassay of human chorionic gonadotropin. Am. J. Obstet. Gynecol. 1978; 131: 97
   PubMed Web of Science ®Google Scholar
• Schultz-Larsen P. Pregnancy specific β1-glycoprotein: reference values and physiological variations in normal pregnancy. Scand. J. Immunol. 1978; 8(suppl. 8)591
   Google Scholar
• Schwartz R. O., Pietro D. L. β-hCG as a diagnostic aid for suspected ectopic pregnancy. Obstet. Gynecol. 1980; 56: 197
   PubMed Web of Science ®Google Scholar
• Searle F., Leake B. A., Bagshawe K. D., Dent J. Serum-SP1-pregnancy-specific-β-glycoprotein in choriocarcinoma and other neoplastic disease. Lancet 1978; i: 579
   Google Scholar
• Seppälä M., Ranta T., Rutanen E.-M., Stenman U.-H., Tontti K., Chard T. Improved diagnosis of pregnancy-related gynaecological emergencies by rapid human chorionic gonadotrophin beta-subunit assay. Br. J. Obstet. Gynaecol. 1981; 88: 138
   PubMedGoogle Scholar
• Seppälä M., Rutanen E.-M., Jalanko H., Lehtovirta P., Stenman U.-H., Engvall E. Pregnancy-specific β-glycoprotein and chorionic gonadotropin-like immuno-reactivity during the latter half of the cycle in women using intrauterine contraception. J. clin. Endocrinol. Metab. 1978; 47: 1216
   PubMed Web of Science ®Google Scholar
• Seppälä M., Tontti K., Ranta T., Stenman U.-H., Chard T. Use of a rapid hCG-beta-subunit radioimmunoassay in acute gynaecological emergencies. Lancet 1980; i: 165
   Google Scholar
• Seppälä M., Venesmaa P., Rutanen E.-M. Pregnancy-specific beta-1 glycoprotein in ectopic pregnancy. Am. J. Obstet. Gynecol. 1980; 136: 189
   PubMed Web of Science ®Google Scholar
• Siiteri J. E., Koistinen R., Ranta T., Stenman U.-H., Seppälä M. Use of a rapid radioimmunoassay for pregnancy-specific beta-1 glycoprotein in gynecologic emergencies: comparison with routine urinary pregnancy test and a rapid radioimmunoassay for human chorionic gonadotropin. Am. J. Obstet. Gynecol 1981; 139: 968
   PubMed Web of Science ®Google Scholar
• Storring P. L., Gaines Das R.E., Bangham D. R. International reference preparation of human chorionic gonadotrophin for immunoassay: potency estimates in various bioassay and protein binding assay systems; and international reference preparations of the α and β subunits of human chorionic gonadotrophin for immunoassay. J. Endocrinol. 1980; 84: 295
   PubMed Web of Science ®Google Scholar
• Tatra G., Polak S., Nasr F. SP-1 und beta-HCG bei Verdacht auf ektopische Gravidität. Geburtsh. Frauenheilk 1981; 41: 359
   PubMed Web of Science ®Google Scholar
• Tatum H. J., Schmidt F. H. Contraceptive and sterilization practices and extrauterine pregnancy: a realistic perspective. Fertil. Steril. 1977; 28: 407
   PubMed Web of Science ®Google Scholar
• Teisner B., Grudzinskas J. G., Hindersson P., Al-Ani A. T.M., Westergaard J. G., Chard T. Molecular heterogeneity of pregnancy specific β1 glycoprotein: the effect on measurement by radioimmunoassay and electroimmunoassay. J. Immunol. Methods 1979; 31: 141
   PubMed Web of Science ®Google Scholar
• Teisner B., Westergaard J. G., Folkersen J., Husby S., Svehag S. E. Two pregnancy-associated serum proteins with pregnancy-specific-glycoprotein determinants. Am. J. Obstet. Gynecol. 1978; 131: 262
   PubMed Web of Science ®Google Scholar
• Towler C. M., Home C. H.W., Jandial V., Cambell D. M., MacGillivray I. Plasma levels of pregnancy-specific β1-glycoprotein in normal pregnancy. Br. J. Obstet, Gynaecol. 1976; 83: 775
   PubMedGoogle Scholar
• Tyrey L., Hammond C. B. The HCG-β-subunit radioimmunoassay: potential error in HCG measurement related to choice of labeled antigen. Am. J. Obstet. Gynecol. 1975; 125: 160
   Web of Science ®Google Scholar
• Weiner C. P. The pseudogestational sac in ectopic pregnancy. Am. J. Obstet. Gynecol. 1981; 139: 959
   PubMed Web of Science ®Google Scholar
• Weingold A. B., Southren A. L. Diamin oxidase as an index of the fetoplacental unit. Obstet Gynecol. 1968; 32: 593
   PubMed Web of Science ®Google Scholar
• Westergaard J. G., Sizaret Ph., Hindersson P., Folkersen J., Teisner B. Pregnancy specific beta-1 glycoprotein (SP1) in patients with trophoblastic disease: molecular heterogeneity and a ‘SP1 consuming factor’. Acta pathol. microbiol. scand. 1980; 88C: 233
   Google Scholar
• Weström L., Bengtsson L. Ph., Mårdh P.-A. Incidence, trends, and risks of ectopic pregnancy in a population of women. Br. Med. J. 1981; 282: 15
   PubMed Web of Science ®Google Scholar
• Yaffe H., Navot D., Laufer N. Pitfalls in early detection of ectopic pregnancy. Lancet 1979; i: 277
   Google Scholar
• Ylikorkala O., Siljander M., Huhtaniemi I., Kauppila A., Seppälä M. Trophoblastic markers in women using intrauterine contraception. Obstet. Gynecol. 1980; 55: 329
   PubMed Web of Science ®Google Scholar