Embryo Screening - GCSE Biology Definition

Embryo screening, also known as preimplantation genetic diagnosis (PGD), is a process used in fertility treatments to check embryos for certain genetic conditions or abnormalities before they are implanted into the womb. This is done by taking a few cells from the embryo when it is just a few days old. Scientists can then test these cells for specific genetic markers that could indicate diseases or disorders, like cystic fibrosis or Down syndrome. The aim of embryo screening is to help parents have a healthy baby by selecting embryos that are more likely to develop into healthy children. It's an important tool in modern medicine, allowing families to make informed choices about their future children's health.