The first steps of human development—those that occur within the first few weeks of pregnancy—remain mysterious in many ways. Within a week of fertilization, human embryos form a blastocyst, which ...

Maternal stress could leave epigenetic imprints on genes in the placenta associated with cortisol—a necessary hormone for fetal development—and this would affect the baby's development from very early ...

Nearly half the embryos studied underwent developmental arrest because of genetic mishaps in early development—a revealing insight that suggests more IVF babies could come to term with changes in the ...

Scientists have created a stem cell-derived model of the human embryo in the lab by reprogramming human stem cells. The breakthrough could help research into genetic disorders and in understanding why ...

The findings shed new light on human reproduction and suggest pathways for developing treatments to lower the risk of ...

From left to right, the researchers Nerea San Martín González, Águeda Castro Quintas, Helena Palma Gudiel and Lourdes Fañanás Saura. Maternal stress could leave epigenetic imprints on genes in the ...