Life begins with a single fertilized cell that gradually transforms into a multicellular organism. This process requires ...

What do the earliest stages of a pregnancy look like? Embryonic development has been extensively studied, but most of our knowledge of the earliest stages of a growing baby come from stationary ...

Research shows how the curved shape of a zebrafish egg sets cell division timing, gene activation, and early cell fate ...

Over the past year or two, we have been exploring what we termed the origins—or the embryology—of human development. We examined the three pillars of development: Feelings (Affects), Language, and ...

"Volume I ,with 423 illustrations." "Volume II, with 658 illustrations." Volume 1: xviii, 548 pages; volume 2: viii, 1032 pages, 1 leaf of folded plates. Beckwith, J ...

Seals give birth only when conditions are right. After mating, a female seal can delay implantation of the embryo in the ...

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 ...

Scientists are exploring ways to mimic the origins of human life without two fundamental components: sperm and egg. They are coaxing clusters of stem cells – programmable cells that can transform into ...