关键词: 妊娠初期, 超声检查，多普勒, 生殖技术，辅助, 血栓形成倾向, 病例报告, 盆腔静脉丛血栓形成

Abstract:

Pelvic venous plexus thrombosis complicating pregnancy is a relatively severe pregnancy-related complication. This disease has a low incidence rate and atypical clinical manifestations, so it is generally difficult to detect. We report a case where, after pregnancy achieved through assisted reproductive technology, a mass in the pelvic venous plexus was detected by routine color Doppler ultrasound examination at more than 40 days of gestation. The ultrasound indicated early pregnancy complicated with pelvic venous plexus thrombosis. After anticoagulant treatment with low-molecular-weight heparin and tocolysis treatment with dydrogesterone, the thrombus disappeared, and the prognosis of the mother and the infant was good. The purpose of reporting this case is to improve the awareness of this disease among ultrasound physicians and clinical physicians. For pregnant women with suspected "thrombophilia" based on clinical laboratory tests and family history, the ultrasound examination should include the intrauterine embryonic development, the condition of the adnexa, and also pay attention to the examination of the pelvic venous plexus, so as to achieve early diagnosis and early treatment of pelvic venous plexus thrombosis and improve the maternal-fetal outcomes.

Key words: Pregnancy trimester, first, Ultrasonography, Doppler, Reproductive techniques, assisted, Thrombophilia, Case reports, Pelvic venous plexus thrombosis