Scientists in Atlanta appear to have overcome a major barrier in reproductive biology by producing a live birth from a woman impregnated with an egg that had been frozen, thawed and fertilized in the ...

For most animals, reproduction is straightforward: Some species lay eggs, while others give birth to live babies. But our recent research uncovered a fascinating mix between the two modes of ...

A cancer survivor who became infertile after chemotherapy treatment has given birth to a baby in a world first hailed as a breakthrough for reproductive science. A cancer survivor who became infertile ...

Our earliest vertebrate (animals with backbones) ancestors laid eggs, but over millions of years of evolution, some species began to give birth to live young. There is a traditional dichotomy in ...

WASHINGTON - The remains of a giant sea creature are providing the first proof that these prehistoric reptiles gave birth to their young rather than laying eggs. Plesiosaurs, which lived at the time ...

Maybe you've seen a "mermaid's purse" while walking on the beach. Not actually an accessory for the mythical creature, these small casings are the eggs of sharks and their relatives. For around 455 ...

WASHINGTON – The remains of a giant sea creature are providing the first proof that these prehistoric reptiles gave birth to their young rather than laying eggs. Plesiosaurs, which lived at the time ...

Normally, animals reproduce by either laying eggs or giving birth to live young, but an Australian species of lizard can apparently do both in the same pregnancy. Scientists at the University of ...

A lizard that both lays eggs and gives birth to live young is helping scientists understand how and why these forms of reproduction evolved. The old riddle, “Which came first, the chicken or the egg?” ...

Parents attempting to start a family using donated or frozen eggs are often told that frozen eggs behave just like fresh ones, but a new study has found that in-vitro fertilization with frozen eggs ...