The findings suggest that fresh embryo transfer may offer a higher live birth rate than frozen embryo transfer in this group.

However, gastrulation, the period beyond this cutoff, represents when the embryo begins to form the eventual body plan, making it an interesting stage to understand early organogenesis. “We’ve just ...

They also emphasized that further studies are necessary to determine the optimal number and stage of embryos for fresh transfer in women with a low IVF prognosis to achieve a singleton pregnancy.

By refining stem cell-based embryo models, this discovery supports the design of targeted therapies, advances regenerative medicine, and improves our ability to explore the earliest stages of life.

“I was always interested in how cells decide their fate,” Zernicka-Goetz said. In the mouse developing embryo, she previously demonstrated a bias at the two-cell stage: one cell contributed more to ...

Figure 2: Sexing litters of preimplantation and midgestational stage embryos. Additionally, blastocyst stage (E3.5) embryos from a cross between D4/XEGFP transgenic males and wild-type ICR females ...