A blood sample from mum and saliva from dad have been used by US researchers to sequence the genome of a foetus.
The scientists at the University of Washington used pieces of the foetus' DNA which naturally float around in the pregnant woman's blood.
These fragments were then pieced together using the parents' DNA as a guide to build a complete 'map' of the foetus's genome.
Dr Jay Shendure University of Washington
They then compared the genetic map drawn 18 weeks into pregnancy with the foetus' actual DNA taken from the umbilical cord after birth. It was 98% accurate.
Via Daniel House