M. Wieringa-de-waard, Threatened miscarriage in general practice: diagnostic value of history taking and physical examination, Br J Gen Pract, issue.483, pp.52-825, 2002.

P. M. Doubilet, Diagnostic criteria for nonviable pregnancy early in the first trimester, N Engl J Med, issue.15, pp.369-1443, 2013.

I. E. Timor-tritsch, D. Farine, and M. G. Rosen, A close look at early embryonic development with the high-frequency transvaginal transducer, American Journal of Obstetrics and Gynecology, vol.159, issue.3, pp.676-81, 1988.
DOI : 10.1016/S0002-9378(88)80033-4

R. L. Bree, Transvaginal sonography in the evaluation of normal early pregnancy: correlation with HCG level, American Journal of Roentgenology, vol.153, issue.1, pp.75-84, 1989.
DOI : 10.2214/ajr.153.1.75

W. B. Warren, Dating the early pregnancy by sequential appearance of embryonic structures, American Journal of Obstetrics and Gynecology, vol.161, issue.3, pp.747-53, 1989.
DOI : 10.1016/0002-9378(89)90394-3

C. B. Coulam, S. Britten, and D. M. Soenksen, Pregnancy: Early (34-56 days from last menstrual period) ultrasonographic measurements in normal pregnancies, Human Reproduction, vol.11, issue.8, pp.11-1771, 1996.
DOI : 10.1093/oxfordjournals.humrep.a019483

E. Jauniaux, Development of the secondary human yolk sac: correlation of sonographic and anatomical features, Human Reproduction, vol.6, issue.8, pp.1160-1166, 1991.
DOI : 10.1093/oxfordjournals.humrep.a137503

S. Britten, Pregnancy: Very early (24???56 days from last menstrual period) embryonic heart rate in normal pregnancies, Human Reproduction, vol.9, issue.12, pp.2424-2430, 1994.
DOI : 10.1093/oxfordjournals.humrep.a138462

H. P. Robinson, Sonar measurement of fetal crown-rump length as means of assessing maturity in first trimester of pregnancy, Br Med J, issue.45883, pp.28-31, 1973.

H. P. Robinson and J. E. Fleming, A CRITICAL EVALUATION OF SONAR "CROWN-RUMP LENGTH" MEASUREMENTS, BJOG: An International Journal of Obstetrics and Gynaecology, vol.4, issue.9, pp.702-712, 1975.
DOI : 10.1002/aja.1000230206

F. P. Hadlock, Fetal crown-rump length: reevaluation of relation to menstrual age (5-18 weeks) with high-resolution real-time US Accuracy of gestational age estimation by means of fetal crown-rump length measurement, Radiology Am J Obstet Gynecol, vol.1823, issue.1, pp.168-903, 1992.

J. Wisser, P. Dirschedl, and S. Krone, Estimation of gestational age by transvaginal sonographic measurement of greatest embryonic length in dated human embryos, Ultrasound in Obstetrics and Gynecology, vol.4, issue.6, pp.457-62, 1994.
DOI : 10.1046/j.1469-0705.1994.04060457.x

A. Kustermann, Transvaginal sonography for fetal measurement in early pregnancy, BJOG: An International Journal of Obstetrics and Gynaecology, vol.15, issue.1, pp.38-42, 1992.
DOI : 10.1016/S0140-6736(89)90046-9

C. Bottomley, T. Bourne-pexsters, and A. , Dating and growth in the first trimester New crown-rump length curve based on over 3500 pregnancies Growth and development of the human fetus prior to the twentieth week of gestation, Best Pract Res Clin Obstet Gynaecol Ultrasound Obstet Gynecol Am J Obstet Gynecol, vol.23, issue.1036, pp.439-52, 1969.

I. Goldstein, Evaluation of normal gestational sac growth: appearance of embryonic heartbeat and embryo body movements using the transvaginal technique Gestational sac diameter in very early pregnancy as a predictor of fetal outcome, Obstet Gynecol Ultrasound Obstet Gynecol, vol.77, issue.63, pp.885-893, 1991.

Y. Abdallah, Limitations of current definitions of miscarriage using mean gestational sac diameter and crown-rump length measurements: a multicenter observational study, Ultrasound in Obstetrics & Gynecology, vol.38, issue.5, pp.497-502, 2011.
DOI : 10.1002/uog.10109

C. Bottomley, Functional linear discriminant analysis: a new longitudinal approach to the assessment of embryonic growth, Human Reproduction, vol.24, issue.2, pp.278-83, 2009.
DOI : 10.1093/humrep/den382

S. Choong, Ultrasound prediction of risk of spontaneous miscarriage in live embryos from assisted conceptions, Ultrasound in Obstetrics and Gynecology, vol.7, issue.6, pp.571-578, 2003.
DOI : 10.1002/uog.909

S. Guha, External validation of models and simple scoring systems to predict miscarriage in intrauterine pregnancies of uncertain viability, Human Reproduction, vol.28, issue.11, pp.28-2905, 2013.
DOI : 10.1093/humrep/det342

J. Oates, A prediction model for viability at the end of the first trimester after a single early pregnancy evaluation Clinical implications of intra-and interobserver reproducibility of transvaginal sonographic measurement of gestational sac and crown-rump length at 6-9 weeks' gestation Intra-and interobserver reproducibility study of early fetal growth parameters, Aust N Z J Obstet Gynaecol Ultrasound Obstet Gynecol Prenat Diagn, vol.53, issue.284, pp.51-58, 2008.

E. Ferrazzi, Miscarriage diagnosis and gestational age estimation in the early first trimester of pregnancy: transabdominal versus transvaginal sonography, Ultrasound in Obstetrics and Gynecology, vol.3, issue.1, pp.36-41, 1993.
DOI : 10.1046/j.1469-0705.1993.03010036.x

K. A. Jain, U. M. Hamper, and R. C. Sanders, Comparison of transvaginal and transabdominal sonography in the detection of early pregnancy and its complications, American Journal of Roentgenology, vol.151, issue.6, pp.151-1139, 1988.
DOI : 10.2214/ajr.151.6.1139

R. G. Pennell, Prospective comparison of vaginal and abdominal sonography in normal early pregnancy., Journal of Ultrasound in Medicine, vol.10, issue.2, pp.63-70, 1991.
DOI : 10.7863/jum.1991.10.2.63

B. Cacciatore, U. H. Stenman, and P. Ylostalo, Comparison of abdominal and vaginal sonography in suspected ectopic pregnancy, Obstet Gynecol, vol.735, issue.1, pp.770-774, 1989.

W. G. Bradley, C. E. Fiske, R. A. Yeh, and H. C. , The Double Sac Sign of Early Intrauterine Pregnancy, Obstetrical & Gynecological Survey, vol.38, issue.1, pp.223-229, 1982.
DOI : 10.1097/00006254-198301000-00009

F. C. Laing, Intradecidual sign: is it effective in diagnosis of an early intrauterine pregnancy?, Radiology, vol.204, issue.3, pp.655-60, 1997.
DOI : 10.1148/radiology.204.3.9280240

G. Chiang, The Intradecidual Sign: Is It Reliable for Diagnosis of Early Intrauterine Pregnancy?, American Journal of Roentgenology, vol.183, issue.3, pp.725-756, 2004.
DOI : 10.2214/ajr.183.3.1830725

C. E. Mueller, L. A. Bastian, and M. V. Chireau, Intrauterine pseudogestational sac in ectopic pregnancy, Journal of Clinical Ultrasound, vol.127, issue.2, pp.133-139, 1979.
DOI : 10.1002/jcu.1870070212

H. Fernandez and A. Gervaise, Ectopic pregnancies after infertility treatment: modern diagnosis and therapeutic strategy, Human Reproduction Update, vol.10, issue.6, pp.503-516, 2004.
DOI : 10.1093/humupd/dmh043

Y. Jeve, Accuracy of first-trimester ultrasound in the diagnosis of early embryonic demise: a systematic review, Ultrasound in Obstetrics & Gynecology, vol.329, issue.5, pp.489-96, 2011.
DOI : 10.1002/uog.10108

J. Verhaegen, Accuracy of single progesterone test to predict early pregnancy outcome in women with pain or bleeding: meta-analysis of cohort studies 345: p. e6077. 41. Sheiner, E. and J.S. Abramowicz, A symposium on obstetrical ultrasound: is all this safe for the fetus? Prediction of ectopic pregnancy in women with a pregnancy of unknown location, BMJ Clin Obstet Gynecol Ultrasound Obstet Gynecol, vol.55, issue.16, pp.188-98, 2007.

E. Kirk, Rationalizing the follow-up of pregnancies of unknown location, Human Reproduction, vol.22, issue.6, pp.1744-50, 2007.
DOI : 10.1093/humrep/dem073

S. Mazouz, J. K. Lee, and H. Fernandez, Evaluation of a urinary test as a diagnostic tool of a nonprogressive pregnancy, Fertility and Sterility, vol.95, issue.2, pp.95-783, 2011.
DOI : 10.1016/j.fertnstert.2010.08.003

A. Connolly, Reevaluation of Discriminatory and Threshold Levels for Serum ??-hCG in Early Pregnancy, Obstetrics & Gynecology, vol.121, issue.1, pp.65-70, 2013.
DOI : 10.1097/AOG.0b013e318278f421

D. E. Pittaway, R. L. Reish, and A. C. Wentz, Doubling times of human chorionic gonadotropin increase in early viable intrauterine pregnancies, American Journal of Obstetrics and Gynecology, vol.152, issue.3, pp.299-302, 1985.
DOI : 10.1016/S0002-9378(85)80215-5

K. T. Barnhart, Symptomatic Patients With an Early Viable Intrauterine Pregnancy, Obstetrics & Gynecology, vol.104, issue.1, pp.50-55, 2004.
DOI : 10.1097/01.AOG.0000128174.48843.12

C. B. Morse, Performance of human chorionic gonadotropin curves in women at risk for ectopic pregnancy: exceptions to??the rules, Fertility and Sterility, vol.97, issue.1, pp.101-107, 2012.
DOI : 10.1016/j.fertnstert.2011.10.037

A. W. Horne, R. Mcbride, and F. C. Denison, Normally rising hCG does not predict live birth in women presenting with pain and bleeding in early pregnancy, European Journal of Obstetrics & Gynecology and Reproductive Biology, vol.156, issue.1, pp.120-121, 2011.
DOI : 10.1016/j.ejogrb.2011.01.013

C. Silva, Human Chorionic Gonadotropin Profile for Women With Ectopic Pregnancy, Obstetrics & Gynecology, vol.107, issue.3, pp.605-615, 2006.
DOI : 10.1097/01.AOG.0000198635.25135.e7

C. Massart, [Application of a rapid serum beta-hCG assay in the early diagnosis of the ectopic pregnancies (author's transl)], J Gynecol Obstet Biol Reprod, vol.10, issue.7, pp.675-81, 1981.

C. Bottomley, Accurate prediction of pregnancy viability by means of a simple scoring system, Human Reproduction, vol.28, issue.1, pp.68-76, 2011.
DOI : 10.1093/humrep/des352

M. Mantoni and J. F. Pedersen, Fetal growth delay in threatened abortion: an ultrasound study, BJOG: An International Journal of Obstetrics and Gynaecology, vol.82, issue.7, pp.525-532, 1982.
DOI : 10.1111/j.1471-0528.1982.tb03653.x

M. Reljic, The significance of crown-rump length measurement for predicting adverse pregnancy outcome of threatened abortion, Ultrasound in Obstetrics and Gynecology, vol.166, issue.6, pp.510-512, 2001.
DOI : 10.1046/j.1469-0705.1993.03060403.x

F. Mukri, Evidence of early first-trimester growth restriction in pregnancies that subsequently end in miscarriage, BJOG: An International Journal of Obstetrics & Gynaecology, vol.11, issue.Suppl B, pp.115-1273, 2008.
DOI : 10.1111/j.1471-0528.2008.01833.x

J. Johns, J. Hyett, and E. Jauniaux, Obstetric outcome after threatened miscarriage with and without a hematoma on ultrasound Spontaneous fetal loss after demonstration of a live fetus in the first trimester, Obstet Gynecol Obstet Gynecol, vol.102, issue.36, pp.483-490, 1987.

T. A. Siddiqi, Rate of spontaneous abortion after first trimester sonographic demonstration of fetal cardiac activity Fetal loss rate after ultrasonically documented cardiac activity between 6 and 14 weeks, menstrual age, Am J Perinatol J Clin Ultrasound, vol.5, issue.194, pp.221-224, 1988.

G. Makrydimas, Fetal loss following ultrasound diagnosis of a live fetus at 6-10 weeks of gestation, Ultrasound in Obstetrics and Gynecology, vol.16, issue.4, pp.368-72, 2003.
DOI : 10.1002/uog.204

A. Aleman, Bed rest during pregnancy for preventing miscarriage Vitamin supplementation for preventing miscarriage Progestogen for preventing miscarriage Double-blind controlled trial of progesterone substitution in threatened abortion Endocrine effects of 17 alpha-hydroxyprogesterone caproate during early pregnancy: a double-blind clinical trial, ): p. CD004073. 65, pp.26-34, 1987.

G. Tognoni, PROGESTAGENS IN THREATENED ABORTION, The Lancet, vol.316, issue.8206, pp.1242-1245, 1980.
DOI : 10.1016/S0140-6736(80)92496-4

V. Gallot, Fausses couches précoces "à répétition" : bilan et prise en charge Human chorionic gonadotrophin (hCG) for preventing miscarriage, Cochrane Database Syst Rev, vol.70, issue.1, p.8611, 2013.

L. Li, Chinese herbal medicines for threatened miscarriage, Cochrane Database Syst Rev Genetics of early miscarriage. Biochim Biophys Acta, issue.512, pp.1822-1951, 2012.

R. B. Lathi, Reliability of 46,XX results on miscarriage specimens: a review of 1,222 first-trimester miscarriage specimens, Fertility and Sterility, vol.101, issue.1, pp.178-82, 2014.
DOI : 10.1016/j.fertnstert.2013.09.031

E. R. Love, Effect of interpregnancy interval on outcomes of pregnancy after miscarriage: retrospective analysis of hospital episode statistics in Scotland Reproductive performance in the next pregnancy for nulliparous women with history of first trimester spontaneous abortion, BMJ Arch Gynecol Obstet, vol.288, issue.4, pp.939-983, 2010.