[Prevalence and complications of monochorionic diamniotic twin pregnancy].

Background: Monochorionic biamniotic (MC/BA) twin pregnancies are at higher risk for twin-to-twin transfusion syndrome (TTTS), selective intrauterine growth restriction (sIUGR) and structural defects.

Material And Method: During an 18 months period all MC/BA twins referred to our unit for clinical surveillance were evaluated. Chorionicity was assessed based on the characteristics of the intertwin amniotic membrane.

[Hypokalemic paralysis during pregnancy: a report of two cases].

The hypokalemic paralysis is a disease characterized by the development of acute muscular weakness, associated to low levels of blood potassium (< 3.5 meq/L). Here we present two cases: in the first one, a 23 years old woman, with 15.