Embryo Research To Reduce Need For In Vitro Fertilization Raises Ethical Concerns

A light micrograph of a primitive human embryo, composed of four cells, following the initial mitotic divisions that ultimately transform a single-cell organism into one composed of millions of cells.

Aiming to find a cheaper, easier way than IVF to ensure human embryos are healthy before implantation, researchers paid women to be inseminated, then flushed the embryos from their wombs for analysis.

(Image credit: Science Photo Libra/Getty Images)