Chromosome copying errors pinpointed in embryo development

A discovery upends decades of assumptions regarding DNA replication. The study show that DNA replication in early embryos is different from what past research has taught, and includes a period of instability that is prone to chromosomal copying errors. As failed pregnancies and developmental disorders are often related to chromosomal abnormalities the findings could impact the field of reproductive medicine, perhaps leading to improved methods of in vitro fertilization (IVF).