Broody

Noun

 * 1) (Poultry) A female bird which is in the condition to incubate eggs; a broody hen, duck, etc.

Adjective

 * 1) (Of birds) sitting persistently and protectively on a nest, in order to hatch eggs (eg, 'a broody hen').
 * 2) (Of any creature or person) acting interested in raising young.

Synonyms

 * clucky
 * baby rabies, one's biological clock is ticking