LH acts on the gonads. In women it supports egg maturation, ovulation and the formation of the corpus luteum, in men it promotes spermsripening. It increases the release of testosterone from the Leydig intermediate cells of the testicle.
More information can be found in module Hormone System I or under
https://de.wikipedia.org/wiki/Luteinisierendes_Hormone (Wikipedia CC-by-sa-3.0)