Bans on close inbreeding is set to take effect on March 1.

"Did it occur to you that maybe your close inbreeding is weakening both your species?"

Incest that results in offspring is a form of close inbreeding (reproduction between two individuals with a common ancestor).

Many mammal species including humanity's closest primate relatives tend to avoid close inbreeding, especially if there are alternative partners available.

Rules to ban close inbreeding (parent/child and sibling/sibling) would take effect 1 March 2009.

A feature of Aurelius' pedigree was his close inbreeding to Hyperion.

New breed standards were announced in January 2009, and close inbreeding was to be banned.

Cedric's pedigree shows an case of close inbreeding as both his parents were sired by the stallion Walton.

Oh, close inbreeding wasn't well thought of; these pioneers were not ignorant of genetics, nor of conception control.

This infertility was attributed by some breeding experts to the close inbreeding in her pedigree.