References
- Practice Committee of American Society for Reproductive Medicine. Definitions of infertility and recurrent pregnancy loss: a committee opinion. Fertil Steril. 2013;99:63.
- Christiansen OB, Steffensen R, Nielsen HS, et al. Multifactorial etiology of recurrent miscarriage and its scientific and clinical implications. Gynecol Obstet Invest. 2008;66:257–267.
- Laird SM, Tuckerman EM, Cork BA, et al. A review of immune cells and molecules in women with recurrent miscarriage. Hum Reprod Update. 2003;9:163–174.
- Pandey MK, Rani R, Agrawal S. An update in recurrent spontaneous abortion. Arch Gynecol Obstet. 2005;272:95–108.
- European Society of Human Reproduction and Embryology [Internet]. Grimbergen, Belgium: Guidline on the management of recurrent pregnancy loss, eshre. 2017. [cited 2019 Apr 15]. Available from: https://www.eshre.eu/-/media/sitecore-files/Guidelines/Recurrent-pregnancy-loss/ESHRE-RPL-Guideline_27112017_FINAL_v2.pdf
- Sugi T, Katsunuma J, Izumi S, et al. Prevalence and heterogeneity of antiphosphatidylethanolamine antibodies in patients with recurrent early pregnancy losses. Fertil Steril. 1999;71:1060–1065.
- Miyakis S, Lockshin MD, Atsumi T, et al. International consensus statement on an update of the classification criteria for definite antiphospholipid syndrome (APS). J Thromb Haemost. 2006;4:295–306.
- Ebina Y, Nishino Y, Deguchi M, et al. Natural killer cell activity in women with recurrent miscarriage: etiology and pregnancy outcome. J Reprod Immunol. 2017;120:42–47.
- Lavergne N, Aristizabal J, Zarka V, et al. Uterine anomalies and in vitro fertilization: what are the results? Eur J Obstet Gynecol Reprod Biol. 1996;68:29–34.
- Tomazevic T, Ban-Frangez H, Virant-Klun I, et al. Septate, subseptate and arcuate uterus decrease pregnancy and live birth rates in IVF/ICSI. Reprod Biomed Online. 2010;21:700–705.
- Venetis CA, Papadopoulos SP, Campo R, et al. Clinical implications of congenital uterine anomalies: a meta-analysis of comparative studies. Reprod Biomed Online. 2014;29:665–683.
- Saravelos SH, Cocksedge KA, Li TC. The pattern of pregnancy loss in women with congenital uterine anomalies and recurrent miscarriage. Reprod Biomed Online. 2010;20:416–422.
- Sugiura-Ogasawara M, Lin BL, Aoki K, et al. Does surgery improve live birth rates in patients with recurrent miscarriage caused by uterine anomalies? J Obstet Gynaecol. 2015;35:155–158.
- Valli E, Vaquero E, Lazzarin N, et al. Hysteroscopic metroplasty improves gestational outcome in women with recurrent spontaneous abortion. J Am Assoc Gynecol Laparosc. 2004;11:240–244.
- Cheng Y, Kawamura K, Deguchi M, et al. Intraovarian thrombin and activated protein C signaling system regulates steroidogenesis during the periovulatory period. Mol Endocrinol(Baltimore, MD). 2012;26:331–340.
- Espana F, Navarro S, Medina P, et al. The role of protein C inhibitor in human reproduction. Semin Thromb Hemost. 2007;33:41–45.
- Elisen MG, van Kooij RJ, Nolte MA, et al. Protein C inhibitor may modulate human sperm-oocyte interactions. Biol Reprod. 1998;58:670–677.
- Kaandorp SP, van Mens TE, Middeldorp S, et al. Time to conception and time to live birth in women with unexplained recurrent miscarriage. Hum Reprod(Oxford, England). 2014;29:1146–1152.
- Greenberg T, Tzivian L, Harlev A, et al. Index pregnancy versus post-index pregnancy in patients with recurrent pregnancy loss. J Matern Fetal Neonatal Med. 2015;28:63.
- Kling C, Magez J, Hedderich J, et al. Two-year outcome after recurrent first trimester miscarriages: prognostic value of the past obstetric history. Arch Gynecol Obstet. 2016;293:1113–1123.
- American College of Obstetricians and Gynecologists Committee on Gynecologic Practice and Practice Committee. Female age-related fertility decline. Committee Opinion No. 589. Fertil Steril. 2014;101:633–634.
- Menken J, Trussell J, Larsen U. Age and infertility. Science. 1986;233:1389–1394.
- Schwartz D, Mayaux MJ. Female fecundity as a function of age: results of artificial insemination in 2193 nulliparous women with azoospermic husbands. Federation CECOS. N Engl J Med. 1982;306:404–406.
- Perricone C, De Carolis C, Giacomelli R, et al. High levels of NK cells in the peripheral blood of patients affected with anti-phospholipid syndrome and recurrent spontaneous abortion: a potential new hypothesis. Rheumatology (Oxford, England). 2007;46:1574–1578.
- Seshadri S, Sunkara SK. Natural killer cells in female infertility and recurrent miscarriage: a systematic review and meta-analysis. Hum Reprod Update. 2014;20:429–438.
- Aoki K, Kajiura S, Matsumoto Y, et al. Preconceptional natural-killer-cell activity as a predictor of miscarriage. Lancet (London, England). 1995;345:1340–1342.
- Shakhar K, Ben-Eliyahu S, Loewenthal R, et al. Differences in number and activity of peripheral natural killer cells in primary versus secondary recurrent miscarriage. Fertil Steril. 2003;80:368–375.
- Yamada H, Morikawa M, Kato EH, et al. Pre-conceptional natural killer cell activity and percentage as predictors of biochemical pregnancy and spontaneous abortion with normal chromosome karyotype. Am J Reprod Immunol. 2003;50:351–354.
- Morikawa M, Yamada H, Kato EH, et al. NK cell activity and subsets in women with a history of spontaneous abortion. Cause, number of abortions, and subsequent pregnancy outcome. Gynecol Obstet Invest. 2001;52:163–167.
- Chao KH, Yang YS, Ho HN, et al. Decidual natural killer cytotoxicity decreased in normal pregnancy but not in anembryonic pregnancy and recurrent spontaneous abortion. Am J Reprod Immunol (New York, NY: 1989). 1995;34:274–280.
- Carbone J, Gallego A, Lanio N, et al. Quantitative abnormalities of peripheral blood distinct T, B, and natural killer cell subsets and clinical findings in obstetric antiphospholipid syndrome. J Rheumatol. 2009;36:1217–1225.
- Katano K, Suzuki S, Ozaki Y, et al. Peripheral natural killer cell activity as a predictor of recurrent pregnancy loss: a large cohort study. Fertil Steril. 2013;100:1629–1634.
- Stephenson MD, Awartani KA, Robinson WP. Cytogenetic analysis of miscarriages from couples with recurrent miscarriage: a case-control study. Hum Reprod(Oxford, England). 2002;17:446–451.