Seki H, Kuromaki K, Takeda S, et al. Persistent subchorionic hematoma with clinical symptoms until delivery. Int J Gynaecol Obstet. 1998;63:123–8.

Article  CAS  PubMed  Google Scholar 

Johns J, Hyett J, Jauniaux E. Obstetric outcome after threatened miscarriage with and without a hematoma on ultrasound. Obstet Gynecol. 2003;102:483–7.

PubMed  Google Scholar 

Xiang L, Wei Z, Cao Y. Symptoms of an intrauterine hematoma associated with pregnancy complications: a systematic review. PLoS One. 2014;9: e111676.

Article  PubMed  PubMed Central  Google Scholar 

Abu-Yousef MM, Bleicher JJ, Williamson RA, et al. Subchorionic hemorrhage: sonographic diagnosis and clinical significance. AJR Am J Roentgenol. 1987;149:737–40.

Article  CAS  PubMed  Google Scholar 

Pearlstone M, Baxi L. Subchorionic hematoma: a review. Obstet Gynecol Surv. 1993;48:65–8.

Article  CAS  PubMed  Google Scholar 

Biesiada L, Krekora M, Krasomski G. Subchorionic hematoma as a risk factor of pregnancy and delivery in women with threatening abortion. Ginekol Pol. 2010;81:902–6.

PubMed  Google Scholar 

Tuuli MG, Norman SM, Odibo AO, et al. Perinatal outcomes in women with subchorionic hematoma: a systematic review and meta-analysis. Obstet Gynecol. 2011;117:1205–12.

Article  PubMed  Google Scholar 

Bennett GL, Bromley B, Lieberman E, et al. Subchorionic hemorrhage in first-trimester pregnancies: prediction of pregnancy outcome with sonography. Radiology. 1996;200:803–6.

Article  CAS  PubMed  Google Scholar 

Lencki SG, Maciulla MB, Eglinton GS. Maternal and umbilical cord serum interleukin levels in preterm labor with clinical chorioamnionitis. Am J Obstet Gynecol. 1994;170:1345–51.

Article  CAS  PubMed  Google Scholar 

Peng CC, Chang JH, Lin HY, et al. Intrauterine inflammation, infection, or both (Triple I): a new concept for chorioamnionitis. Pediatr Neonatol. 2018;59:231–7.

Article  PubMed  Google Scholar 

Sauerbrei EE, Pham DH. Placental abruption and subchorionic hemorrhage in the first half of pregnancy: US appearance and clinical outcome. Radiology. 1986;160:109–12.

Article  CAS  PubMed  Google Scholar 

Dickey RP, Olar TT, Curole DN, et al. Relationship of first-trimester subchorionic bleeding detected by color doppler ultrasound to subchorionic fluid, clinical bleeding, and pregnancy outcome. Obstet Gynecol. 1992;80:415–20.

CAS  PubMed  Google Scholar 

Ball RH, Ade CM, Schoenborn JA, et al. The clinical significance of ultrasonographically detected subchorionic hemorrhages. Am J Obstet Gynecol. 1996;174:996–1002.

Article  CAS  PubMed  Google Scholar 

Nagy S, Bush M, Stone J, et al. Clinical significance of subchorionic and retroplacental hematomas detected in the first trimester of pregnancy. Obstet Gynecol. 2003;102:94–100.

PubMed  Google Scholar 

Ozkaya E, Altay M, Gelişen O. Significance of subchorionic haemorrhage and pregnancy outcome in threatened miscarriage to predict miscarriage, preterm labour and intrauterine growth restriction. J Obstet Gynaecol. 2011;31:210–2.

Article  CAS  PubMed  Google Scholar 

Jouppila P. Clinical consequences after ultrasonic diagnosis of intrauterine hematoma in threatened abortion. J Clin Ultrasound. 1985;13:107–11.

Article  CAS  PubMed  Google Scholar 

Leite J, Ross P, Rossi AC, et al. Prognosis of very large first-trimester hematomas. J Ultrasound Med. 2006;25:1441–5.

Article  PubMed  Google Scholar 

Costantino M, Guaraldi C, Costantino D. Resolution of subchorionic hematoma and symptoms of threatened miscarriage using vaginal alpha lipoic acid or progesterone: clinical evidences. Eur Rev Med Pharmacol Sci. 2016;20:1656–63.

CAS  PubMed  Google Scholar 

Wegmann TG, Lin H, Guilbert L, et al. Bidirectional cytokine interactions in the maternal-fetal relationship: is successful pregnancy a TH2 phenomenon? Immunol Today. 1993;14:353–6.

Article  CAS  PubMed  Google Scholar 

Chigusa Y, Kishore AH, Mogami H, et al. Nrf2 activation inhibits effects of thrombin in human amnion cells and thrombin-induced preterm birth in mice. J Clin Endocrinol Metab. 2016;101:2612–21.

Article  CAS  PubMed  PubMed Central  Google Scholar 

Jauniaux E, Watson AL, Hempstock J, et al. Onset of maternal arterial blood flow and placental oxidative stress. A possible factor in human early pregnancy failure. Am J Pathol. 2000;157:2111–22.

Article  CAS  PubMed  PubMed Central  Google Scholar 

Ben-Haroush A, Yogev Y, Mashiach R, et al. Pregnancy outcome of threatened abortion with subchorionic hematoma: possible benefit of bed rest? Isr Med Assoc J. 2003;5:422–4.

PubMed  Google Scholar 

Coomarasamy A, Devall AJ, Cheed V, et al. A randomized trial of progesterone in women with bleeding in early pregnancy. N Engl J Med. 2019;380:1815–24.

Article  CAS  PubMed  Google Scholar