When a woman in her mid-40s underwent a single, genetically normal embryo transfer, clinicians expected -- and counseled for -- a singleton pregnancy. What followed instead was one of the rarest ...

Although the name sounds alarming, Vanishing Twin Syndrome is a recognised medical condition that often occurs in early ...

Conjoined twins arise from aberrant early embryonic events in monozygotic pregnancies, resulting in partial incomplete separation or secondary union of two embryonic discs. Conjunction sites—cranial, ...

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how a humble single cell becomes an organism fascinates scientists across ...

Using CRISPR-based engineering methods to prompt stem cells to organize into embryo-like structures, scientists were able to create 'programmable' cellular models of embryos without ever experimenting ...