Naturally I hadn't considered the possibility, after so long, that she'd produce viable offspring.

Large female fish produce more viable offspring and are vital in a population.

Adult fish may appear healthy despite their inability to produce viable offspring.

They can produce viable offspring, with all subsequent generations being fertile.

These pairs of species have split so recently that they can still produce viable offspring.

These include the ability to create viable offspring, and morphological similarity.

More precisely, fertility is the capacity of an individual or population to produce viable offspring.

Greater choice and variety of mates increases a female's chance to produce more viable offspring.

It has interbred with this very species and produced viable offspring.

In the past decade, very few wild nests have been found, and even fewer produced viable offspring.