This site is targeted at medical and radiology professionals, contains user contributed content, and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

Bilobed placenta

A bilobed placenta (or bipartite placenta) is a variation in placental morphology and refers a placenta seperated into two near equal lobes. If more than two lobes are present it is termed a tri lobed / four lobed and so on.


The estimated incidence is at up to ~ 4 % of pregnancies.


It is thought to result from localised atrophy as result of poor dedicualisation or vascularisation of a part fo the uterus (dynamic placentation theory) 5


Radiographic features

Antenatal ultrasound

May be sonographically seen as two seprate placental discs of near equal size. The cord usually attaches to a thin connecting rim of chorionic tissue which bridges the two lobes. Less commonly the cord may insert into one of the lobes.


  • it carries an increased incidence of type II vasa previa
  • it may increase the incidence of post partum haemorrhage due to retained placental tissue

Differential diagnosis

If more than one lobe of placenta is seen in an antenatal scan consider

Updating… Please wait.


Error Unable to process the form. Check for errors and try again.

Alert_accept Thank you for updating your details.