Another change within the last 200 years is in the field of reproductive biology.

Also, the reproductive biology of some Trimeresurus species is as yet unknown.

These were people for whom complex reproductive biology was the single defining attribute of their lives.

Nothing is known of the species ecology and reproductive biology.

It wasn't the references to reproductive biology that made me self-conscious.

Almost nothing is known about their reproductive biology.

In addition, there are reasons not directly related to reproductive biology.

The reproductive biology of this fish is not well known.

Little is currently known about this species' reproductive biology, and no juveniles have ever been discovered in the field.