[1]	Santana DS, Cecatti JG, Surita FG, et al. twin pregnancy and severe maternal outcomes:the world health organization multicountry survey on maternal and newborn health[J]. Obstet Gynecol, 2016, 127(4):631-641. DOI:10.1097/AOG.0000000000001338. Cited in this article [1]

[2]	Rissanen AS, Jernman RM, Gissler M, et al. Maternal complications in twin pregnancies in Finland during 1987-2014:a retrospective study[J]. BMC Pregnancy Childbirth, 2019, 19(1):337. DOI:10.1186/s12884-019-2498-x. Cited in this article [2]

[3]	Narang K, Szymanski LM. Multiple gestations and hypertensive disorders of pregnancy:what do we know?[J]. Curr Hypertens Rep, 2020, 23(1):1. DOI:10.1007/s11906-020-01107-4. Cited in this article [1]

[4]	Laine K, Murzakanova G, Sole KB, et al. Prevalence and risk of pre-eclampsia and gestational hypertension in twin pregnancies:a population-based register study[J]. BMJ Open, 2019, 9(7):e029908. DOI:10.1136/bmjopen-2019-029908. Cited in this article [1]

[5]

Sibai BM, Hauth J, Caritis S, et al. Hypertensive disorders in twin versus singleton gestations. National Institute of Child Health and Human Development Network of Maternal-Fetal Medicine Units[J]. Am J Obstet Gynecol, 2000, 182(4):938-942. DOI:10.1016/s0002-9378(00)70350-4. Cited in this article [1]

[6]	Bartnik P, Kosinska-Kaczynska K, Kacperczyk J, et al. Twin chorionicity and the risk of hypertensive disorders:gestational hypertension and pre-eclampsia[J]. Twin Res Hum Genet, 2016, 19(4):377-382. DOI:10.1017/thg.2016.17. Cited in this article [1]

[7]	Shiozaki A, Matsuda Y, Satoh S, et al. Impact of fetal sex in pregnancy-induced hypertension and preeclampsia in Japan[J]. J Reprod Immunol, 2011, 89(2):133-139. DOI:10.1016/j.jri.2010.12.011. Cited in this article [1]

[8]	Zhu J, Zhang J, Wu Y, et al. Intertwin growth discordance throughout gestation and hypertensive disorders of pregnancy[J]. Am J Obstet Gynecol, 2023, 228(6):730.e1-730.e13. DOI:10.1016/j.ajog.2022.11.1290. Cited in this article [1]

[9]	Kim HM, Cha HH, Seong WJ, et al. Prediction of maternal complications and neonatal outcome in dichorionic diamniotic twins with fetal weight discordancy measured by ultrasonography[J]. Sci Rep, 2022, 12(1):14889. DOI:10.1038/s41598-022-18864-8. Cited in this article [1]

[10]	Qiao P, Zhao Y, Jiang X, et al. Impact of growth discordance in twins on preeclampsia based on chorionicity[J]. Am J Obstet Gynecol, 2020, 223(4):572.e1-572.e8. DOI:10.1016/j.ajog.2020.03.024. Cited in this article [1]

[11]	Dai F, Pan S, Lan Y, et al. Pregnancy outcomes and risk factors for preeclampsia in dichorionic twin pregnancies after in vitro fertilization:a five-year retrospective study[J]. BMC Pregnancy Childbirth, 2022, 22(1):830. DOI:10.1186/s12884-022-05184-y. Cited in this article [1]

[12]	Lu Y, Ding Z, Li W, et al. Prediction of twin pregnancy preeclampsia based on clinical risk factors,early pregnancy serum markers,and uterine artery pulsatility index[J]. Pak J Med Sci, 2021, 37(7):1727-1733. DOI:10.12669/pjms.37.7.5041. Cited in this article [2]

[13]	Mustafa HJ, Kalafat E, Prasad S, et al. Machine learning prediction of hypertension and diabetes in twin pregnancies using characteristics at prenatal care entry:a nationwide study[J]. Ultrasound Obstet Gynecol, 2024. DOI:10.1002/uog.27710. Cited in this article [1]

[14]	Taguchi T, Ishii K, Hayashi S, et al. Clinical features and prenatal risk factors for hypertensive disorders in twin pregnancies[J]. J Obstet Gynaecol Res, 2014, 40(6):1584-1591. DOI:10.1111/jog.12408. Cited in this article [1]

[15]	Romanenko TG, Sulimenko OM. Prevention of preeclampsia in women with multiple pregnancy after assisted reproduction[J]. Wiad Lek, 2020, 73(3):494-497. Cited in this article [2]

[16]	Saleh L, Tahitu SIM, Danser AHJ, et al. The predictive value of the sFlt-1/PlGF ratio on short-term absence of preeclampsia and maternal and fetal or neonatal complications in twin pregnancies[J]. Pregnancy Hypertens, 2018, 14:222-227. DOI:10.1016/j.preghy.2018.03.014. Cited in this article [1]

[17]	Xiang Q, Chen Y, Gu X, et al. The correlation between maternal serum sST2,IL-33 and NT-proBNP concentrations and occurrence of pre-eclampsia in twin pregnancies:A longitudinal study[J]. J Clin Hypertens (Greenwich), 2022, 24(11):1516-1523. DOI:10.1111/jch.14579. Cited in this article [1]

[18]	Svirsky R, Maymon R, Melcer Y, et al. First and second trimester maternal serum inhibin A levels in twins with pre-eclampsia[J]. Prenat Diagn, 2016, 36(11):1071-1074. DOI:10.1002/pd.4937. Cited in this article [1]

[19]	Queirós A, Domingues S, Gomes L, et al. First-trimester uterine artery Doppler and hypertensive disorders in twin pregnancies:Use of twin versus singleton references[J]. Int J Gynaecol Obstet, 2024, 167(2):705-713. DOI:10.1002/ijgo.15706. Cited in this article [1]

[20]	Maymon R, Trahtenherts A, Svirsky R, et al. Developing a new algorithm for first and second trimester preeclampsia screening in twin pregnancies[J]. Hypertens Pregnancy, 2017, 36(1):108-115. DOI:10.1080/10641955.2016.1242605. Cited in this article [1]

[21]	Kim YR, Jung I, Heo SJ, et al. A preeclampsia risk prediction model based on maternal characteristics and serum markers in twin pregnancy[J]. J Matern Fetal Neonatal Med, 2021, 34(21):3623-3628. DOI:10.1080/14767058.2019.1686757. Cited in this article [1]

[22]	Wu H, Yu L, Xie Z, et al. The impact of maternal serum biomarkers on maternal and neonatal outcomes in twin pregnancies:a retrospective cohort study conducted at a tertiary hospital[J]. Peer J, 2024, 12:e18415. DOI:10.7717/peerj.18415. Cited in this article [1]

[23]	Xiang Q, Wei Y, Feng X, et al. Initial establishment and validation of a predictive model for preeclampsia in twin pregnancies based on maternal characteristics and echocardiographic parameters[J]. Acta Obstet Gynecol Scand, 2023, 102(11):1566-1574. DOI:10.1111/aogs.14651. Cited in this article [1]

[24]	Bergeron TS, Roberge S, Carpentier C, et al. Prevention of preeclampsia with aspirin in multiple gestations:a systematic review and meta-analysis[J]. Am J Perinatol, 2016, 33(6):605-610. DOI:10.1055/s-0035-1570381. Cited in this article [1]

[25]	Kalafat E, Shirazi A, Thilaganathan B, et al. The role of aspirin in prevention of preeclampsia in twin pregnancies:does the dose matter?[J]. Am J Obstet Gynecol, 2020, 223(3):457-458. DOI:10.1016/j.ajog.2020.03.005. Cited in this article [1]

[26]	Huang D, Xie Y, Duan P, et al. Potential impact on using aspirin as the primary prevention of adverse pregnancy outcomes in twins conceived using ART[J]. Sci Rep, 2024, 14(1):2223. DOI:10.1038/s41598-024-51543-4. Cited in this article [1]

[27]	The American College of Obstetricians and Gynecologists. ACOG committee opinion No. 743:low-dose aspirin use during pregnancy[J]. Obstet Gynecol, 2018, 132(1):e44-e52. DOI:10.1097/AOG.0000000000002708. Cited in this article [1]

[28]	Gent J, Nanda S, Khalil A, et al. Antenatal management of multiple pregnancies within the UK:A survey of practice[J]. Eur J Obstet Gynecol Reprod Biol, 2020, 254:74-78. DOI:10.1016/j.ejogrb.2020.08.024. Cited in this article [1]

[29]	Heyborne KD, Porreco RP. Selective fetocide reverses preeclampsia in discordant twins[J]. Am J Obstet Gynecol, 2004, 191(2):477-480. DOI:10.1016/j.ajog.2004.01.009. Cited in this article [1]

[30]	Hladunewich MA, Steinberg G, Karumanchi SA, et al. Angiogenic factor abnormalities and fetal demise in a twin pregnancy[J]. Nat Rev Nephrol, 2009, 5(11):658-662. DOI:10.1038/nrneph.2009.154. Cited in this article [1]

[31]	Brandt JS, Ananth CV. Placental abruption at near-term and term gestations:pathophysiology,epidemiology,diagnosis,and management[J]. Am J Obstet Gynecol, 2023, 228(5S):S1313-S1329. DOI:10.1016/j.ajog.2022.06.059. Cited in this article [1]

[32]	Ananth CV, Demissie K, Hanley ML. Birth weight discordancy and adverse perinatal outcomes among twin gestations in the United States:the effect of placental abruption[J]. Am J Obstet Gynecol, 2003, 188(4):954-960. DOI:10.1067/mob.2003.210. Cited in this article [1]

[33]	Aliyu MH, Alio AP, Lynch O, et al. Maternal pre-gravid body weight and risk for placental abruption among twin pregnancies[J]. J Matern Fetal Neonatal Med, 2009, 22(9):745-750. DOI:10.3109/14767050902994523. Cited in this article [2]

[34]	Ozkan S, Firatligil FB, Sucu S, et al. Can inflammatory biomarkers based on first trimester complete blood count parameters predict placental abruption ?:A case-control study[J]. J Reprod Immunol, 2024, 164:104279. DOI:10.1016/j.jri.2024.104279. Cited in this article [1]

[35]	Su J, Yang Y, Cao Y, et al. The predictive value of pre-delivery laboratory test results for the severity of placental abruption and pregnancy outcome[J]. Placenta, 2021, 103:220-225. DOI:10.1016/j.placenta.2020.10.006. Cited in this article [1]

[36]	Lanna MM, Faiola S, Consonni D, et al. Increased risk of placental abruption after solomon laser treatment of twin-twin transfusion syndrome[J]. Placenta, 2017, 53:54-56. DOI:10.1016/j.placenta.2017.03.018. Cited in this article [1]

[37]	Caserta D, Bordi G, Stegagno M, et al. Maternal and perinatal outcomes in spontaneous versus assisted conception twin pregnancies[J]. Eur J Obstet Gynecol Reprod Biol, 2014, 174:64-69. DOI:10.1016/j.ejogrb.2013.12.011. Cited in this article [1]

[38]	Justman N, Goldfreind R, Abu-Rass H, et al. Risk factors for prolonged intertwin delivery interval and associated maternal and second twin morbidity[J]. Am J Perinatol, 2024, 41(S1):e2587-e2592. DOI:10.1055/s-0043-1772229. Cited in this article [1]

[39]	Aliyu MH, Alio AP, Lynch O, et al. Maternal pre-gravid body weight and risk for placental abruption among twin pregnancies[J]. J Matern Fetal Neonatal Med, 2009, 22(9):745-750. DOI:10.3109/14767050902994523. Cited in this article [1]

[40]	Lai FY, Johnson JA, Dover D, et al. Outcomes of singleton and twin pregnancies complicated by pre-existing diabetes and gestational diabetes:A population-based study in Alberta,Canada,2005-11[J]. J Diabetes, 2016, 8(1):45-55. DOI:10.1111/1753-0407.12255. Cited in this article [1]

[41]	Yogev Y, Eisner M, Hiersch L, et al. The performance of the screening test for gestational diabetes in twin versus singleton pregnancies[J]. J Matern Fetal Neonatal Med, 2014, 27(1):57-61. DOI:10.3109/14767058.2013.799660. Cited in this article [1]

[42]	Hiersch L, Berger H, Okby R, et al. Incidence and risk factors for gestational diabetes mellitus in twin versus singleton pregnancies[J]. Arch Gynecol Obstet, 2018, 298(3):579-587. DOI:10.1007/s00404-018-4847-9. Cited in this article [1]

[43]	Hiersch L, Berger H, Okby R, et al. Incidence and risk factors for gestational diabetes mellitus in twin versus singleton pregnancies[J]. Arch Gynecol Obstet, 2018, 298(3):579-587. DOI:10.1007/s00404-018-4847-9. Cited in this article [2]

[44]	Zhang Z, Mei L, Li L, et al. Maternal and neonatal outcomes of twin pregnancies complicated by gestational diabetes mellitus[J]. Endocrine, 2024, 84(2):388-398. DOI:10.1007/s12020-023-03588-0. Cited in this article [1]

[45]	Marleen S, Kodithuwakku W, Nandasena R, et al. Maternal and perinatal outcomes in twin pregnancies following assisted reproduction:a systematic review and meta-analysis involving 802462 pregnancies[J]. Hum Reprod Update, 2024, 30(3):309-322. DOI:10.1093/humupd/dmae002. Cited in this article [1]

[46]	Hoskins RE. Zygosity as a risk factor for complications and outcomes of twin pregnancy[J]. Acta Genet Med Gemellol (Roma), 1995, 44(1):11-23. DOI:10.1017/s0001566000001859. Cited in this article [1]

[47]	Vannuccini S, Bolzonella S, Colucci C, et al. A 10-year observational study on twin pregnancy:role of fetal sex pairing on obstetric outcome[J]. Twin Res Hum Genet, 2023 September 14. DOI:10.1017/thg.2023.38. Cited in this article [1]

[48]	Maymon R, Meiri H, Svirski R, et al. Maternal serum screening marker levels in twin pregnancies affected by gestational diabetes[J]. Arch Gynecol Obstet, 2019, 299(3):655-663. DOI:10.1007/s00404-018-5010-3. Cited in this article [1]

[49]	Weitzner O, Barrett J, Murphy KE, et al. National and international guidelines on the management of twin pregnancies:a comparative review[J]. Am J Obstet Gynecol, 2023, 229(6):577-598. DOI:10.1016/j.ajog.2023.05.022. Cited in this article [1]

[50]	Zhu X, Huang C, Wu L, et al. Perinatal outcomes and related risk factors of single vs. twin pregnancy complicated by gestational diabetes mellitus:meta-analysis[J]. Comput Math Methods Med, 2022, 2022:3557890. DOI:10.1155/2022/3557890. Cited in this article [1]

[51]	Pan Y, Wang Y, Miao J, et al. Risk factors for postpartum hemorrhage in severe pre-eclampsia:a retrospective single-centre study of 1953 cases[J]. Med Sci Monit, 2024, 30:e943772. DOI:10.12659/MSM.943772. Cited in this article [1]

[52]	Li S, Gao J, Liu J, et al. Incidence and risk factors of postpartum hemorrhage in China:a multicenter retrospective study[J]. Front Med (Lausanne), 2021,8:673500. DOI:10.3389/fmed.2021.673500. Cited in this article [1]

[53]	Lan Y, Xu A, Lu X, et al. Risk factors for postpartum hemorrhage in twin pregnancies with cesarean section[J]. Front Med (Lausanne), 2024,10:1301807. DOI:10.3389/fmed.2023.1301807. Cited in this article [3]

[54]	Loussert L, Schmitz T, Korb D, et al. Risk of severe postpartum hemorrhage in twin pregnancies according to the sum of birth weights[J]. Obstet Gynecol, 2022, 140(6):958-964. DOI:10.1097/AOG.0000000000004993. Cited in this article [1]

[55]	de Moreuil C, Mehic D, Nopp S, et al. Hemostatic biomarkers associated with postpartum hemorrhage:a systematic review and meta-analysis[J]. Blood Adv, 2023, 7(19):5954-5967. DOI:10.1182/bloodadvances.2023010143. Cited in this article [1]

[56]	Qi S, Fu X. Establishment of a predictive model for postpartum hemorrhage in twins:a retrospective study[J]. BMC Pregnancy Childbirth, 2023, 23(1):644. DOI:10.1186/s12884-023-05933-7. Cited in this article [3]

[57]	Suzuki S, Kikuchi F, Ouchi N, et al. Risk factors for postpartum hemorrhage after vaginal delivery of twins[J]. J Nippon Med Sch, 2007, 74(6):414-417. DOI:10.1272/jnms.74.414. Cited in this article [1]

[58]	Schubert J, Timmesfeld N, Noever K, et al. Impact of maternal body mass index and gestational weight gain on maternal and neonatal outcomes in twin pregnancies[J]. Acta Obstet Gynecol Scand, 2023, 102(2):181-189. doi: 10.1111/aogs.14485. Cited in this article [1]

[59]	Zhang Y, Chen L, Zhou W, et al. Nomogram to predict postpartum hemorrhage in cesarean delivery for twin pregnancies:a retrospective cohort study in China[J]. Front Med (Lausanne), 2023,10:1139430. DOI:10.3389/fmed.2023.1139430. Cited in this article [1]

[60]	Peska E, Balki M, Pfeifer W, et al. Oxytocin at elective cesarean delivery:a dose-finding study in pregnant people with twin pregnancy[J]. Anesth Analg, 2024, 138(4):814-820. DOI:10.1213/ANE.0000000000006309. Cited in this article [1]

[61]	Bai J, Sun Q, Zhai H. A comparison of oxytocin and carboprost tromethamine in the prevention of postpartum hemorrhage in high-risk patients undergoing cesarean delivery[J]. Exp Ther Med, 2014, 7(1):46-50. DOI:10.3892/etm.2013.1379. Cited in this article [1]

[62]	Kim ML, Hur YM, Ryu H, et al. Clinical outcomes of prophylactic compression sutures for treatment of uterine atony during the cesarean delivery of twins[J]. BMC Pregnancy Childbirth, 2020, 20(1):40. DOI:10.1186/s12884-019-2716-6. Cited in this article [1]

[63]	Abdulsalam FAM, Bourdakos NE, Burns JWF, et al. Twin pregnancy and postpartum haemorrhage:a systematic review and meta-analysis[J]. BMC Pregnancy Childbirth, 2024, 24(1):649. DOI:10.1186/s12884-024-06798-0. Cited in this article [1]

[64]	Biswas S, Gomez J, Horgan R, et al. Mirror syndrome:a systematic literature review[J]. Am J Obstet Gynecol MFM, 2023, 5(9):101067. Cited in this article [1]

[65]	Chen R, Liu M, Yan J, et al. Clinical characteristics of mirror syndrome:a retrospective study of 16 cases[J]. J Obstet Gynaecol, 2021, 41(1):73-76. DOI:10.1080/01443615.2020.1718621. Cited in this article [1]

[66]	Graham N, Garrod A, Bullen P, et al. Placental expression of anti-angiogenic proteins in mirror syndrome:a case report[J]. Placenta, 2012, 33(6):528-531. DOI:10.1016/j.placenta.2012.02.016. Cited in this article [1]

[67]	De Oliveira L, Sass N, Boute T, et al. sFlt-1 and PlGF levels in a patient with mirror syndrome related to cytomegalovirus infection[J]. Eur J Obstet Gynecol Reprod Biol, 2011, 158(2):366-367. DOI:10.1016/j.ejogrb.2011.04.049. Cited in this article [1]

[68]	Gavin NR, Forrest AD, Rosner M, et al. The role of fetal therapy in the management of mirror syndrome:a narrative review[J]. J Matern Fetal Neonatal Med, 2024, 37(1):2345307. DOI:10.1080/14767058.2024.2345307. Cited in this article [1]

[69]	Midgley DY, Harding K. The Mirror syndrome[J]. Eur J Obstet Gynecol Reprod Biol, 2000, 88(2):201-202. DOI:10.1016/s0301-2115(99)00147-5. Cited in this article [1]

[70]	Chimenea A, García-Díaz L, Calderón AM, et al. Resolution of maternal mirror syndrome after succesful fetal intrauterine therapy:a case series[J]. BMC Pregnancy Childbirth, 2018, 18(1):85. DOI:10.1186/s12884-018-1718-0. Cited in this article [2]

[71]	Chang YL, Chao AS, Hsu JJ, et al. Selective fetocide reversed mirror syndrome in a dichorionic triplet pregnancy with severe twin-twin transfusion syndrome:a case report[J]. Fetal Diagn Ther, 2007, 22(6):428-430. DOI:10.1159/000106348. Cited in this article [1]

[72]	Matsubara M, Nakata M, Murata S, et al. Resolution of mirror syndrome after successful fetoscopic laser photocoagulation of communicating placental vessels in severe twin-twin transfusion syndrome[J]. Prenat Diagn, 2008, 28(12):1167-1168. DOI:10.1002/pd.2128. Cited in this article [1]

[73]	李根霞, 李孟宇, 张俊雅, 等. 不同单绒毛膜双羊膜囊双胎妊娠并发症射频消融减胎术后妊娠结局分析[J]. 中国实用妇科与产科杂志, 2024, 40(2):230-234.DOI:10.19538/j.fk2024020120. Cited in this article [1]