The majority of fertilized eggs die and are resorbed into the body. ZEISS Microscopy/Flickr, CC BY-SA As an evolutionary biologist whose career has focused on how embryos develop in a wide variety of ...

(RNS) — Scientists have created a human embryo without the use of sperm or an egg — a true test-tube baby. Such embryos cannot (yet) develop into full-grown human beings. Even if transplanted into a ...

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 ...

They see a microscopic flash at fertilization, a burst of fluorescence that marks a sudden release of zinc from the human egg. Scientists call this burst the "zinc spark," and they now see it as a ...

Scientists have discovered a kind of “pause button” in early human development. This biological mechanism has long been known in other mammals, but its discovery in humans could aid IVF procedures.

Using human stem cells, scientists have created human embryo-like structures inside petri dishes. These lab-grown blobs develop multiple structures that mimic a human embryo after implantation into ...

A fertility clinic in Australia has confirmed a critical error in which one woman gave birth to another couple’s child after an embryo transfer went wrong. The ...

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 article ...

Alabama’s Supreme Court has ruled that frozen embryos are people, the first time a court has ever given rights and protections so early after conception. The ruling is limited to Alabama, but it has ...

The University of Alabama at Birmingham health system has paused infertility treatments after the Alabama State Supreme Court ruled embryos created during in vitro fertilization should be legally ...