(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 ...

A California-based company says it has created the world's first early-stage human egg cells from stem cells using lab-grown ...

The method could one day become a treatment for infertility A decade of further research needed, scientists say The process overcomes an obstacle that stymied previous attempts Significant safety ...

Progress in the in vitro derivation of human gametes (eggs and sperm) continues to advance. In vitro–derived gametes are generated using pluripotent stem cells (PSCs) through a process called “in ...

Why is Male Sperm Quality Important? In the human reproductive process, both men and women play equally significant roles. While many tend to associate fertility issues solely with women, scientific ...

Human reproductive cloning is currently the subject of much debate around the world, involving a variety of ethical, religious, societal, scientific, and medical issues. This report from the National ...

New research has mapped the cell types that specialize to form reproductive organs in both sexes, identifying key genes and signals that drive this process. The findings offer important insights into ...

We all know the drill for reproduction—sperm meets egg. But mice aren’t people. And the same recipe doesn’t work for human reproductive cells. One reason, according to Dr. Mitinori Saitou at Kyoto ...

New research reveals the presence of microplastics in human reproductive fluids, raising important questions about their potential risks to fertility and reproductive health European Society of Human ...

A female grey seal tending to her pup on the beaches of Sable Island, Nova Scotia. Gray seals only nurse their pups for 15-20 days before the female leaves and the pup must learn to forage on its own.