Pregnancy of unknown location

##plugins.themes.academic_pro.article.main##

Monia Malek-mellouli
Fethi Ben Amara
Hédi Reziga

Abstract

Background : A pregnancy of unknown location is a descriptive term that can be defined after performing trans vaginal ultrasound. This situation includes patients with a positive pregnancy test but with no evidence of intra or extra uterine pregnancy on transvaginal sonography.
Aim: To discuss different aspects of management of women with pregnancy of unknown location.
Methods: Review of the literature.
Results: Serum human chorionic gonadotrophin levels, progesterone levels and mathematical models are helpful in the prediction of final outcome of pregnancy: intra uterine pregnancy, ectopic pregnancy, spontaneous resolution or persistent pregnancy of unknown location. Active expectant management of asymptomatic women with a pregnancy of unknown location has been shown to be safe.
Conclusion: Surgical intervention (diagnostic laparoscopy and uterine curettage) to diagnose the location of the pregnancy should be restrictive.

Keywords:

Pregnancy of unknown location; ectopic pregnancy; transvaginal ultrasound

##plugins.themes.academic_pro.article.details##

References

  1. Hahlin M, Sjoblon P, Lindblom B. Combined use of progesterone and human chorionic gonadotropin determinations for differential diagnosis of very early pregnancy. Fertil Steril 1991; 55: 492-96.
  2. Stovall TG, Ling Fw. Ectopic pregnancy diagnostic and therapeutic algorithms minimizing surgical intervention. J Reprod Med 1993; 38: 807-12.
  3. Cacciatore B, Stenman UH, Ylostalo P. Comparison of abdominal and vaginal sonography in suspected ectopic pregnancy. Obstet Gynecol 1989; 73: 770-4.
  4. Fossum GT, Davajan V, Kletzky OA. Early detection of pregnancy with transvaginal U S. Fertil Steril 1988; 49: 788-91.
  5. Nyberg D A, Laing Fc, Filly RA. Threatened abortion: Sonographic distinction of normal and abnormal gestation sacs. Radiology 1986; 158: 397-400.
  6. Banerjee S, Aslam N, Zosmer N, Woelfer B, Jurkovic D. The expectant management of women with pregnancies of unknown location. Ultrasound Obstet Gyneacol 1999; 14: 231-6.
  7. Hahlin M, Thorburn J, Bryman I. The expectant management of early pregnancies of uncertain site. Hum Reprod 1995; 10: 1223-7.
  8. Banerjee S, Aslam N, Woelfer B, Lawrence A, Elson J, Jurkovic D. Expectant management of early pregnancies of unknown location: a prospective evaluation of methods to predict spontaneous resolution of pregnancy. Br J Obstet Gyneacol 2001; 108: 158-63.
  9. Hajenius PJ, Mol BW, Ankum WM et al. Clearance curves of serum human chorionic gonadotrophin for the diagnosis of persistent trophoblast. Hum Reprod 1995; 10: 683-87.
  10. Condous G, Kirk E, Van calster B, Van Huffel S, Timmerman D, Bourne T. Failing pregnancies of unknown location : a prospective evaluation of the human chorionic gonadotrophin ratio. Br J Obstet Gynecol 2006; 113: 521-7.
  11. Condous G, Tiemmerman D, Goldstein S, Valentins L, Jurkovic D, Bourne T. Pregnancies of unknown location : consensus statement .Ultrasound Obstet Gynecol 2006;28:121-22.
  12. Kirk E, Bourne T. Pregnancy of unknown location. Obstet Gynaecol Reprod Med 2009; 19: 80-3.
  13. Barnhart akt, Van Mello NM, Bourne T et al. Pregnancy of unknown location: a consensus statement of nomenclature,definitions,and outcome. Fertil Steril 2011;95:857- 66.
  14. Condous G, Kirk E, Lu C et al. Diagnostic accuracy of varying discriminatory zones for the prediction of ectopic pregnancy in women with a pregnancy of unknown location. Ultrasound Obstet Gynecol 2005; 26: 770-5.
  15. Ankum WM, Van der Veen F, Hamerlynck JV, Lammes FB. Transvaginal sonography and human chorionic gonadotrophin measurements in suspected ectopic pregnancy: a detailed analysis of a diagnostic approach. Hum Reprod 1993; 8: 1307-11.
  16. Kirk E, Daemen A, Papageorghiou AT et al. Why are some ectopic pregnancies characterized as pregnancies of unknown location at the initial trans vaginal ultrasound examination? Acta Obstet Gynecol Scand 2008; 87: 1150-4.
  17. Hajenius PJ, Mol BW, Ankum WM, van der Veen F, Bossuyt PM, Lammes FB. Suspected ectopic pregnancy: expectant management in patients with negative sonographic findings and low serum hCG concentrations. Early Pregnancy 1995; 1: 258-62.
  18. Condous G, Okaro E, Bourne T. Pregnancies of unknown location: diagnosis dilemmas and management. Curr Opin Obstet Gynecol 2005; 17: 568-73.
  19. Cacciatore B, Stenman UH, Ylostalo P. Diagnosis of ectopic pregnancy by vaginal ultrasonography in combination with a discriminatory serum hCG level of 1000 IU/L (IRP). Br J Obstet Gynaecol 1990; 97: 904-8.
  20. Condous G, Okaro E, Khalid A et al. A prospective evaluation of a single-visit strategy to manage pregnancies of unknown location. Hum Reprod 2005; 20: 1398-403.
  21. Condous G, Lu C, Van Huffel S, Timmerman D, Bourne T. Human chorionic gonadotrophin and progesterone levels for the investigation of pregnancies of unknown location. Int J Gynecol Obstet 2004; 86: 351-7.
  22. Condous G, Okato E, Bourne T. The conservative management of early pregnancy complications: a review of the literature. Ultrsound Obstet Gynecol 2003;22:420-30.
  23. Barnhart K, Sammel M, Gracia C, Chittams J, Hummel A, Shaunik A. Risk factors for ectopic pregnancy in women with symptomatic first-trimester pregnancies. Fertil Steril 2006; 86: 36-43.
  24. Couque N, Frossard C, Briffa JM, Sedrati L, Dumont JP. Intérêt du dosage de la progestérone sérique dans la prise en charge des grossesses anormales (grossesse extra-utérine, fausses couches spontanées) au cours du premier trimestre. Immuno-analyse & Biologie spécialisée 2003; 18: 152-7.
  25. Herlicoviez M, Barjot P, Lucas V, Six T, Von Theobald P. Conduite à tenir devant des métrorragies du premier trimestre de la grossesse. EMC Gynécol Obst (Elsevier Masson SAS, Paris), 1995: 5-049-D-16.
  26. Ingrand J. : Gonadotrophine chorionique (hCG) et sous-unité bêta libre : EMC (Elsevier Masson SAS, Paris), Biologie Clinique/Biochimie : 90-10-0495, 2007.
  27. Condous G. The management of early pregnancy complications. Best Pract Res Clin Obstet Gynaecol. 2004; 18: 37-57.
  28. Barnhart K. Prompt diagnosis of ectopic pregnancy in an emergency department setting. Obstet Gynecol 1994; 84:1010-5.
  29. Kadar N, DeVore G, Romero R. Discriminatory hCG zone: its use in the sonographic evaluation for ectopic pregnancy. Obstet Gynecol 1981; 58: 156-61.
  30. Wojak JC, Clayton MJ, Nolan TE. Outcomes of ultrasound diagnosis of ectopic pregnancy: Dependence on observer experience. Invest Radiol 1995; 30: 115-7.
  31. Mol BW, Hajenius PJ, Engelsbel S et al. Serum human chorionic gonadotropin measurement in the diagnosis of ectopic pregnancy when trans vaginal sonography is inconclusive. Fertil Steril 1998; 70: 972-81.
  32. Barnhat KT, Simhan H, Kamethe SA. Diagnostic accuracy of ultrasound above and below the beta-hCG discriminatory zone. Obstet Gynecol 1999; 94: 583-7.
  33. Kirk E, Daemen A, Papageorghiou AT et al. Why some ectopic pregnancies characterised as pregnancies of unknown location at the initial trans vaginal ultrasound examination. Acta Obstet Gynecol Scand 2008;87: 1150-54.
  34. Braunstein GD, Karow WG, Gentry WC, Rasor J, Wade ME. First-trimester chorionic gonadotropin measurements as an aid in the diagnosis of early pregnancy disorders. Am J Obstet Gynecol 1978; 131: 25-32.
  35. Lenton EA, Neal LM, Sulaiman R. Plasma concentrations of human chorionic gonadotropin from the time of implantation until the second week of pregnancy. Fertil Steril 1982; 37: 773-8.
  36. Kadar N, Caldwell BV, Romero R. A method of screening for pregnancy and its indications. Obstet Gynecol 1981; 58: 162-6.
  37. Silva C, Sammel MD, Zhou L et al. Human chorionic gonadotrophin profile for women with ectopic pregnancy. Obstet Gynecol 2006; 107: 605-10.
  38. Barnhart KT, Sammel MD, Rinaudo PF et al. Symptomatic patients with an early viable intrauterine pregnancy: HCG curves redefined. Obstet Gynecol 2004; 104: 50-5.
  39. Seeber BE, Sammel MD, Guo W et al. Application of redefined human chorionic gonadotropin curves for the diagnosis of women at risk for ectopic pregnancy. Fertil Steril 2006; 86: 454-9.
  40. Barnhart K, Sammel MD, Chung K et al. Decline of serum human chorionic gonadotropin and spontaneous complete abortion: defining the normal curve. Obstet Gynecol 2004; 104: 975-81.
  41. Condous G, Timmerman D, Goldstein S et al. Pregnancies of unknown location: consensus statement. Ultrasound Obstet Gynecol 2006; 28: 121-2.
  42. Barnhart K, Sammel MD, Chung K et al. Decline of serum human chorionic gonadotropin and spontaneous complete abortion: defining the normal curve. Obstet Gynecol 2004; 104: 975-81.
  43. Dupuis O, Clerc J, Madelenat P, Golfier F, Raudrant D. Grossesse extra-utérine. EMC Gynécol Obstét (Elsevier Masson SAS, Paris), 2009 : 5-032- A-30.
  44. Bignardi T, Condous G, Alhamdan D et al. The hCG ratio can predict the ultimate viability of the intrauterine pregnancies of uncertain viability in the pregnancy of unknown location population. Hum Reprod 2008; 23:1964-7.
  45. Mildwisky A. Chrionic gonadotrophin and progesterone levels in ectopic pregnancy. Obstet Gynecol 1980; 50:145-7.
  46. Milwidsky A, Segal S, Menashe M. Corpus luteum function in ectopic pregnancy. Int J Fertil 1984; 2: 244-6.
  47. Daily CA, Laurent SL, Nunley WC. The prognostic value of serum progesterone and quantitative beta-human chorionic gonadotropin in early human pregnancy. Am J Obstet Gynecol 1994; 171: 380-3.
  48. Mol BW, Lijmer JG, Ankum WM, Van der Veen F, Bossuyt PM. The accuracy of single serum progesterone measurement in the diagnosis of ectopic pregnancy: a meta-analysis. Hum Reprod 1998; 13: 3220-7.
  49. Shepherd R, Patton PE, Novy MJ, Burry KA. Serial ß-hCG measurements in the early detection of ectopic pregnancy. Obstet Gynecol 1990; 75: 476-7.
  50. Gelder MS, Boots LR, Younger JB. Use of a single random serum progesterone value as a diagnostic aid for ectopic pregnancy. Fertil Steril 1991; 55: 497-500.
  51. Monnier-Barbarino P. Grossesse extra-utérine : apport des examens paracliniques hors échographie. J Gynecol Obstet Biol Reprod 2003; 32 (Supp 3 ): 39-53.
  52. Isaacs JD, Whitworth NS, Cowan BD. Relative operating characteristic analysis in reproductive medicine: comparison of progesterone and human chorionic gonadotropin doubling time as predictors of early gestationel normalcy. Fert Steril 1994; 62: 452-5.
  53. Perkins SL, Al-Ramahi M, Claman P. Comparison of serum progesterone as an indicator of pregnancy nonviability in spontaneous pregnant emergency room and infertility clinic patient populations. Fertil Steril 2000; 73: 499-504.
  54. Buckley RG, King KJ, Disney JD, Riffenburgh RH, Gorman JD, Klausen JH. Serum progesterone testing to predict ectopic pregnancy in symptomatic first-trimester patients. Ann Emerg Med 2000; 36: 95-100.
  55. Gracia CR, Barnhart KT. Diagnosing ectopic pregnancy: decision analysis comparing six strategies. Obstet Gynecol 2001; 97: 464-70.
  56. Couque N, Frossard C, Briffa JM, Sedrati L, Dumont JP. Intérêt du dosage de la progestérone sérique dans la prise en charge des grossesses anormales (grossesse extra-utérine, fausses couches spontanées) au cours du premier trimestre. Immuno-analyse et Bologie spécialisée 2003; 18: 152-7.
  57. Duncan WC. Measurement of creatine kinase activity and diagnosis of ectopic pregnancy. Br J Obstet Gynaecol 1995; 102: 233-7.
  58. Lavie O, Beller U, Neuman M et al. Maternal serum creatine kinase: a possible predictor of tubal pregnancy. Am J Obstet Gynecol 1993; 169: 1149-50.
  59. Chandra L. Maternal serum creatinine kinase as a biochemical marker of tubal pregnancy. Int J Gynaecol Obstet 1995; 49: 21-3.
  60. Condous G, Kirk E, Syed A et al. Do levels of serum cancer antigen 125 and creatine kinase predict the outcome in pregnancies of unknown location? Hum Reprod 2005; 20: 3348- 54.
  61. Kobayashi F, Takashima E, Sagawa N et al. Maternal serum CA125 levels in early intrauterine pregnancies and tubal pregnancies. Arch Gynecol Obstet 1993; 252: 185-9.
  62. Prakash A, Laird S, Tuckerman E et al. Inhibin A and activin A may be used to predict pregnancy outcome in women with recurrent miscarriage. Fertil Steril 2005; 836: 1758-63.
  63. Muttukrishna S, Jauniaux E, Greenwold N et al. Circulating levels of inhibin A, activin A and follistatin in missed and recurrent miscarriages. Hum Reprod 2002; 17: 3072-8.
  64. Al-Azemi M, Ledger WL, Diejomaoh M et al. Measurement of inhibin A and inhibin pro-alphaC in early human pregnancy and their role in the prediction of pregnancy outcome in patients with recurrent pregnancy loss. Fertil Steril 2003; 80: 1473-9.
  65. Florio P, Severi FM, Bocchi C et al. Single serum activin A testing to predict ectopic pregnancy. J Clin Endocrinol Metab 2007; 92: 1748-53.
  66. Seifer DB, Lambert-Messerlian GM, Canick JA et al. Serum inhibin levels are lower in ectopic than intrauterine spontaneously conceived pregnancies. Fertil Steril 1996; 65: 667-9.
  67. Kirk E, Papageorghiou AT, Van Calster B, et al. The use of serum inhibin A and activin A levels in predicting the outcome of "pregnancies of unknown location". Hum Reprod 2009; 24: 2451- 6.
  68. Chetty M, Sawyer E, Dew T, Chapman AJ, Elson J. The use of novel biochemical markers in predicting spontaneously resolving pregnancies of unknown location. Hum Reprod 2011;18:1-6.
  69. Zorn JR, Risquez F, Mignot T, Boyer P, Guichard A, Cedard L. Diagnostic ultra-précoce de la grossesse extra-utérine : méthodes et indications. Gynécologie 1989; 40: 363-7.
  70. Condous G, Okaro E, Khalid A et al. The use of a new logistic regression model for predicting the outcome of pregnancies of unknown location. Hum Reprod 2004; 19: 1900-10.
  71. Condous G, Van Calster B, Kirk E et al. Prediction of ectopic pregnancy in women with a pregnancy of unknown location. Ultrasound Obstet Gynecol 2007; 29: 680-7.
  72. Kirk E, Condous G, Haider Z et al. The practical application of a mathematical model to predict the outcome of pregnancies of unknown location. Ultrasound Obstet Gynecol 2006; 27: 311-5.
  73. Kirk E, Condous G, Van Calster B, Van Huffel S, Timmerman D,Bourne T. Rationalizing the follow-up of pregnancies of unknown location. Hum Reprod 2007; 22: 1744-50.
  74. Kirk E, Bourne T. Pregnancy of unknown location. Obstet Gynaecol Reprod Med 2009; 19: 80-3.
  75. Beucher G, Beillat T, Dreyfus M. Prise en charge des fausses couches spontanées du premier trimestre. J Gynecol Obstet Biol Reprod 2003; 32: 5-21.
  76. Condous G, Lu C, Van Huffel S, Timmerman D, Bourne T. Human chorionic gonadotrophin and progesterone levels for the investigation of pregnancies of unknown location. Int J Gynecol Obstet 2004; 86: 351-7.
  77. Cacciatore B, Ylostalo P, Stenman UH et al. Suspected ectopic pregnancy: ultrasound findings and hCG levels assessed by an immunofluorometric assay. Br J Obstet Gynaecol 1988; 95: 497-502.
  78. Mol BW, Van der Veen F. Results of expectant management of women early pregnancy and unknown location. Ultrasound Obstet Gynecol 1999; 14: 231-6.
  79. Dart RG, Mitterando J, Dart LM. Rate of change of serial betahuman chorionic gonadotropin values as a predictor of ectopic pregnancy in patients with indeterminate trans vaginal ultrasound findings. Ann Emerg Med 1999; 34: 703-10.
  80. Stovall TG, Ling FW, Carson SA, Buster JE. Serum progesterone and uterine curettage in differential diagnosis of ectopic pregnancy. Fertil steril 1992; 57: 456-8.
  81. Stovall TG, Ling FW, Carson SA et al. Non-surgical diagnosis and treatment of tubal pregnancy. Fertil Steril 1990; 54: 537-48.
  82. Condous G, Kirk E, Lu C et al. There is no role for uterine curettage in the contemporary diagnostic workup of women with a pregnancy of unknown location. Hum Reprod 2006; 21: 2706- 10.
  83. Barnhart KT, Katz I, Hummel A, Gracia CR. Presumed diagnosis of ectopic pregnancy. Obstet Gynecol 2002; 100: 505-10.
  84. Ollendorff DA, Fejgin MD, Barzilai M, Be-Noon I, Gerbie AB. The value of curettage in the diagnosis of ectopic pregnancy. Am J Obstet Gynecol 1987; 157: 71-2.