A shark expert, whose own curiosity about these fascinating fish was sparked by the movie "Jaws," explains some of their ...

Embryo models are getting remarkably realistic.The little clump of cells looked almost like a human embryo. Created from stem cells, without eggs, sperm, or a womb, the embryo model had a yolk sac ...

Producing the right number of yolk sac forming cells may be critical for infertility treatment using in vitro fertilised (IVF) embryos. Only limited research can be performed directly on human ...

A new study using stem cell-based models has shed new light on how the human embryo begins to develop, which could one day benefit the development of fertility treatment. The study led by at the ...

The first four weeks of human embryo development is when the embryo makes all of its organs. The rest is just growth. During this period it’s just impossible to obtain samples. It’s too early.

Scientists have grown a scalable new embryo-like model that unshrouds some mysteries of early human development, including blood cell formation, or hematopoiesis—a first for the field. In an ...

Like an embryo, heX-Embryoids have embryonic tissue and a yolk sac structure. The tissue remains anchored to the lab dish as it grows, forming a large sheet of yolk sac with dozens of embryoids ...

The yolk sac is a structure observed during the early development of the human embryo that provides nutrients and allows gas exchange to the fetus until the placenta develops fully.

The most advanced models, revealed in September by an Israeli team that Hanna was part of, show all the cell types that are essential for an embryo’s development — the placenta, yolk sac ...

Recent breakthroughs in making stem-cell based human embryo models are raising urgent questions about to what extent they should be treated like natural embryos and whether they are open to misuse.