Abnormally eccentric gestational sac

An eccentrically-located gestational sac towards the fundus of the uterus is the normal sonographic appearance; however, an abnormally eccentric gestational sac on ultrasound may be apparent due to a number of causes

They include

• interstitial ectopic pregnancy
• normally implanted pregnancy in a 
  • bicornuate uterus
  • unicornuate uterus
• displacement by a uterine leiomyoma or other myometrial mass
• a focal myometrial contraction at the time of scanning
• far lateral intrauterine pregnancy

Practical points

• cessation of pregnancy can be scrutinized in female, presented with decidual reaction and eccentrically placed gestational sac 

• it minimizes the distress of females along with the reduction of workload.