Jak'tahla
Jak'tahla was a phase in a Klingon's maturation roughly analogous to puberty, though according to Jean-Luc Picard that word "hardly does it justice". Its effects included accelerated hair growth, mood swings, increased aggressive tendencies, odd cravings for the blood of a live kolar beast, and the appearance of es on the Klingon's face.

In 2375, the metaphasic radiation from the Ba'ku planet's rings caused Lieutenant Commander Worf to re-enter jak'tahla. ()

de:Jak'tahla
Klingonese
Sex and reproduction