A recent ATR study found that up to 30% of twins were incorrect or unsure about their zygosity i.e. whether they are identical or non-identical.
Why does it matter and how can you find out for sure...
Research Involving Twins: Invaluable insights into what it is to be human. Attend this free event on September 13th to understand the strengths and weaknesses of a variety of twin study designs and the resources available to collect and analyse data from twins.