Boklage CE. Survival probability of human conceptions from fertilization to term. Int J Fertil 1990;35:75-94.
Wilcox AJ, Weinberg CR. Incidence of early loss of pregnancy. N Engl J Med 1988;319:189-194.
Fantel AG, Shepard TH. Morphological analysis of spontaneous abortuses. In: Bennett MJ, Edmonds DK, editors. Spontaneous and recurrent abortion. Oxford, UK: Blackwell Scientific Publications;1987. pp. 8-28.
Kline J, Stein Z. Epidemiology of chromosomal anomalies in spontaneous abortion. In: Bennett MJ, Edmonds DK. editors. Spontaneous and recurrent abortion. Oxford, UK: Blackwell Scientific Publications;1987. pp. 29-50.
ACOG. Technical Bulletin. Early pregnancy loss. Number 212 Sep. 1995.
Warburton D, Kline J. Does the karyotype of a spontaneous abortion predict the karyotype of a subsequent abortion? Am J Hum Genet 1987;41:465-83.
Breth VK, Hanes V. Prognosis of a new pregnancy following previous spontaneous abortions. Eur J Obstet Gynecol Reprod Biol 1991;39:31-36.
Eiben B, Bartels I. Cytogenetic analysis of 750 spontaneous abortions with direct-preparation method of chorionic villi and its implications for studying genetic causes of pregnancy wastage. Am J Hum Genet 1990;47:656-663.
Balasch J, Creus M. The significance of luteal phase deficiency on fertility: a diagnostic and therapeutic approach. Hum Reprod 1986;1:145.
Mills JL, Simpson JL. Incidence of spontaneous abortion among normal women and insulin dependent diabetic women whose pregnancies were identified within 21 days of conception. N Engl J Med 1988;319:1617-1623.
Sagle M, Bishop K. Recurrent early miscarriage and polycystic ovary. Br Med J 1988;297:1027-1028.
Johnson P, Pearce JM. Recurrent spontaneous abortion and polycystic ovary disease. Br Med J 1990;300:154-156.
Pedersen JF, Mantoni M. Large intrauterine haematomata in threatened miscarriage: frequency and clinical consequences. Br J Obstet Gynaecol 1990;97:75.
Tower CL, Regan L. Intrauterine haematomas in a recurrent miscarriage population. Hum Reprod 2001;16(9):2005-2007.
Quin PA, Chewchuck AB. Efficacy of antibiotic therapy in preventing spontaneous pregnancy loss among couples colonized with genital mycoplasma. Am J Obstet Gynecol 1983;145:239-244.
Golan A, Langer RM. Cervical cerclage: its role in the pregnant anomalous uterus. Int J Fertil 1990;35:164.
Feingold M, Brook I. Detection of cervical incompetence by ultrasound. Acta Obstet Scand 1984;63:407.
Branch DW. Antiphospholipid antibodies and pregnancy: maternal implications. Semin Perinatol 1990;14:139-146.
Empson M, Lassere M. Recurrent pregnancy loss with antiphospholipid antibody. A systematic review of therapeutic trials. Obstet Gynecol 2002;99:135-144.
Bastian LA, Piscitelli JT. Is this patient pregnant? Can you reliably rule in or rule out early pregnancy by examination?. JAMA 1997;278:586-591.
Robinson ET, Barber JH. Early diagnosis of pregnancy in general practice. J R Coll Gen Pract 1977;27:335-338.
Zabin lS, Emerson MR. Adolescents with negative pregnancy test results: an accessible at risk group. JAMA 1996;275:113-117.
Warburton D, Frasier F. Spontaneous abortion risks in man: data from reproductive histories collected in a medical genetics unit. Am J Hum Genet 1964;16:1-12.
Kadar N, Boher M. A prospective randomized study of the chorionic gonadotropin-time relationship in early gestation: a clinical implications. Fertil Steril 1993;60:409-412.
Chard T. Pregnancy tests: a review. Hum Reprod 1992;7:701-710.
Norman RJ, Menabawey M. Relationship between blood and urine concentrations of intact human chorionic gonadotropin and its free subunits in early pregnancy. Obstet Gynecol 1987;69:590-593.
Daviaud J, Fournet D. Reliability and feasibility of pregnancy home-use test: laboratory validation and diagnostic evaluation by 638 volunteers. Clin Chem 1993;39:53-59.
LaGrew DC, Wilson EA. Determination of gestational age by serun concentrations of human chorionic gonadotropin. Obstet Gynecol 1983;62:37-40.
Steinkampf MP, Guzkick DS. Identification of early pregnancy landmarks by transvaginal sonography: analysis by logistical regression. Fertil Steril 1997;68:168-170.
Nyberg DA, Laing FC. Ultrasonographic differentiation of the gestational sac of early intrauterine pregnancy from the pseudogestational sac of ectopic pregnancy. Radiology 1983;146:755-759.
Nyberg DA, Mark lA. Early pregnancy complications: endovaginal sonographic findings correlated with human gonadotropin levels. Radiology 1988;167:619-622.
Bree RL, Edwards M. Transvaginal sonography in the evaluation of normal early pregnancy: correlation with Hgc level. Am J Roentgenol 1989;153:75-79.
Hellman LM, Kobayashi M. Growth and development of human fetus prior to the twentieth week of gestation. Am J Obstet Gynecol 1969;103:789-800.
Rossavik IK, Torjusen GO. Conceptual age and ultrasound measurements of gestational sac and crown-rump length in “in vitro” fertilization pregnancies. Fertil Steril 1988;49:1012-1017.
Daya S, Woods S. Early pregnancy assessment with transvaginal ultrasound scanning. CMAJ 1991;144:441-446.
Goldstein SR. Significance of cardiac activity on endovaginal ultrasound in very early embryos. Obstet Gynecol 1992;80:670-672.
Spitz IM, Bardin CW. Early pregnancy termination with mifepristone and misoprostol in the United States. N Engl J Med 1998;338:1241-1247.
Peyron R, Aubeny E. Early termination of pregnancy with mifepristone (RU 486) and the orally active prostaglandin misoprostol. N Engl J Med 1993;328:1509-1513.
Aubeny E, Peyron R. Termination of early pregnancy (up to 63 days of amenorrhea) with mifepristone and increasing doses of misoprostol. Int J Fertil Menopausal Stud 1995;40 (Suppl 2):85-91.
Wood SL, Brain PH. Medical management of missed abortion: a randomized clinical trial. Obstet Gynecol 2002;99(4):563-566.
Carbonell JL, Velazco A. Misoprostol 3, 4 or 5 days after methotrexate for early abortion: a randomized trial. Contraception 1997;56:169-174.
Greenslade F, Leonard A. Manual vacuum aspiration: a summary of clinical and programatic experience woridwide. Ipas monograph. Carrborro, NC, USA: Ipas;1993.
Jermyk LC. Outcome of expectant management of spontaneous first trimester miscarriage: observational study. Br Med J 2002;324(7342):873-875.
Ballagh SA, Harris HA. Is curettage needed for uncomplicated incomplete spontaneous abortion? Am J Obstet Gynecol 1998;179(5):1279-1282.
Kruse B, Poppema S. Management of side effects and complicactions in medical abortion. Am J Obstet Gynecol 2000;183(Suppl 2): S65-S75.
Johnson JE. Effects of accurate expectations about sensations on the sensory and distress components of pain. J Pers Soc Psychol 1973;27:261-275.
Ashok PW, Penney GC. An effective regimen for early medical abortion: a report of 2000 consecutive cases. Human Reprod 1998;13:2962-2965.
Hakim-Elahi E, Tovell HM. Complications of first-trimester abortion: a report of 170,000 cases. Obstet Gynecol 1990;76:129-135.
Programa Clinos. IASIST Méx. Grupos Relacionados con el Diagnostico (GRD). México: Hospital de Ginecoobstetricia “Luis Castelazo Ayala” IMSS; 1999-2002.
Conway K, Russell G. Couples grief and experience of support in the aftermath of miscarriage. Br J Med Psychol 2000; 73(4):531-545.
Neugebauer R, Kline J. Major depressive disorder in the 6 months after miscarriage. JAMA 1997;277(5):383-388.