A cloned horse born to its dam twin

Cesare Galli, Irina Lagutina, Gabriella Crotti, Silvia Colleoni, Paola Turini, Nunzia Ponderato, Roberto Duchi, Giovanna Lazzari

Nature 424, 635 (2003)10.1038/424635a

It has been drawn to our attention that a successful pregnancy in a goat carrying a genetically identical conceptus has previously been reported1; complete immune compatibility was demonstrated between the mother and her kid twin (both generated by splitting a single embryo). These findings also indicate that a maternal immune response is not necessary to support a healthy pregnancy.