See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. What do the earliest stages of a pregnancy look like? Embryonic ...

As nearly one in six couples experience fertility issues, in-vitro fertilization (IVF) is an increasingly common form of reproductive technology. However, there are still many unanswered scientific ...

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 ...

The interaction between embryonic and extraembryonic tissues is critical in natural mouse embryogenesis. Here, to enable such interaction in vitro, we describe a protocol to assemble a complete mouse ...

A 3D image of the Hanna lab's human embryo model on Day 14, including the placenta. Image provided by the Hanna lab and resized by Fierce. (Jacob Hanna, Ph.D., Weizmann Institute for Science) ...

Intracellular ice formation during cryopreservation is lethal to the cell, including during warming. Here, we examined the effect of sample volume and warming rate on the cryopreservation success of 1 ...

Starting 16 days after the iPSCs were cultured, parts of the structures called blood islands began producing waves of precursor cells to bone marrow, red blood cells and lymphoid cells like white ...

A new discovery by researchers at the RIKEN Center for Biosystems Dynamics (BDR) in Japan upends decades of assumptions regarding DNA replication. Led by Ichiro Hiratani and colleagues, the ...