https://hsrc.himmelfarb.gwu.edu/gwhpubs/8481/
"Early twin-to-twin transfusion syndrome: From early gestational physio" by Ali Javinani, Asma...
Twin-to-Twin Transfusion Syndrome (TTTS) occurs in about 15 % of monochorionic twin pregnancies, less frequently does it occur prior to 18 weeks of gestation....