References
- 1. Schorge J, Halvorson L, Schaffer J. et al. First-Trimester Abortion, Williams Gynecology. 2008, Ch. 6
- 2. Wilcox AJ, Weinberg CR, O'Connor JF et al. Incidence of early loss of pregnancy. N Engl J Med. 1988; 319: 189–194.10.1056/NEJM198807283190401
- 3. Hollis B, Mavrides E, Campbell S, Tekai A, Thilaganathan B. Reproducibility and repeatability of transabdominal uterine artery. Doppler velocimetry between 10 and 14 weeks of gestation. Ultrasound Obstet Gynecol. 2001; 18: 593–7.10.1046/j.0960-7692.2001.00544.x
- 4. Ivanov P Gecheva St., Tsvyatkovska Tsv.i satr.677 C>T polymorphism in the MTHFR as a factor for embryonic losses ploda. Akusherstvo and ginekologiya. 2014; 53(1): 8–12.
- 5. Urato A, Norwitz ER, A guide towards pre-pregnancy management of defective implantation and placentation, Best Practice & Research Clinical Obstetrics and Gynaecology. 2011; 25: 367–387.10.1016/j.bpobgyn.2011.01.003
- 6. Hoozemans DA, Schats R, Lambalk CB, et al. Human embryo implantation: current knowledge and clinical implications in assisted reproductive technology. Reprod BioMed Online. 2004; 9: 692–715.10.1016/S1472-6483(10)61781-6
- 7. Jauniaux E. Design, beauty and differentiation: the human fetus during the first trimester of gestation. Reprod BioMed, Online. 2000; 1: 107–108.10.1016/S1472-6483(10)61948-7
- 8. Norwitz ER, Schust DJ & Fisher SJ. Implantation and the survival of early pregnancy. N Engl J Med. 2001; 345: 1400–1408.10.1056/NEJMra000763
- 9. Alkazar JL, Ruiz-Perez ML. Uteroplacental circulation in patients with first trimester threatened abortion. Fertil Steril. 2000; 73: 130–5.10.1016/S0015-0282(99)00486-0
- 10. Kurjak A, Zudenigo I, Predanic M, Kupesic S, Funduk B. Assessment of the fetomaternal circulation in threatened abortion by transvaginal color Doppler. Fetal Diag Ther. 1994; 9: 341–7.10.1159/0002639597818784
- 11. Pellizzari P, Pozzan C, Marchiori S, Zen T, Gangemi M. Assessment of uterine artery blood flow in normal first-trimester pregnancies and in those complicated by uterine bleeding. Ultrasound Obstet Gynecol. 2002; 19: 366–70.10.1046/j.1469-0705.2002.00667.x11952966
- 12. Manal M, et al. Uterine artery Doppler and urinary hyperglycosylated HCG as predictors of threatened abortion outcome, Middle East Fertility Society Journal (2013) from 18.42 to 46.