Here’s what you’ll learn when you read this story: With more than 100,000 people in need of an organ transplant in the U.S. alone, scientists have turned toward perfecting human-animal chimeras as a ...

There may be good reasons to object to using animals as living organ factories, including welfare concerns. But the rationale ...

Then researchers placed blastoids and embryos donated after infertility treatments inside the little device and watched it ...

In a Maryland operating room one day in November 2025, doctors made medical history by transplanting a genetically modified pig kidney into a living patient. The kidney had been engineered to mimic ...

Implantation, one of the most poorly understood phases of early human development, occurs in the depths of the womb, at a ...

A team of scientists has just gotten a closer peek into one of the earliest and most fundamental steps of creating a human life. Research out today highlights how they captured—for the first ...

In a quiet lab at Cornell University, scientists have made a discovery that could reshape how we think about life’s earliest stages. Researchers found that male and female embryos begin developing ...

The team placed blastocysts—embryos 5-6 days after fertilization that were donated following IVF procedures—onto the artificial endometrium. The blastocysts attached to the surface of the lining, ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Monika Piotrowska, University at Albany, State University of New York (THE ...

For decades, scientists knew that male embryos in many mammal species—such as cows, mice, and even humans—tend to grow faster than female ones. But no one really knew why. The new study, published in ...