Generally, learning that your twins are mono di is nothing to worry about. The mono di twin survival rate is around 97%, with only around 15% of mono di cases developing into a situation that requires close monitoring or hospital intervention. read more
Monochorionic twins occur in 0.3% of all pregnancies. 75% of monozygotic twin pregnancies are monochorionic; the remaining 25% are dichorionic diamniotic. If the placenta divides, this takes place after the third day after fertilization. read more