1. A method comprising: based on characteristics of a first unit of input speech, selecting a gender-specific speaker adaptation technique, wherein the gender-specific speaker adaptation technique relates to a particular gender; conducting, by a computing device, automatic speech recognition (ASR) of a second unit of input speech, wherein the ASR of the second unit of input speech is based on the gender-specific speaker adaptation technique; based on characteristics of the second unit of speech, selecting a speaker-dependent speaker adaptation technique, wherein the speaker-dependent speaker adaptation technique relates to a particular speaker of the particular gender; and conducting ASR of a third unit of input speech, wherein the ASR of the third unit of speech is based on the speaker-dependent speaker adaptation technique.