Premise: But now the teen-age out-of-wedlock birth rate seems to be leveling off--reflecting, Chatterbox supposes, some hard-won equilibrium between teen-agers' greater use of contraceptives, on the one hand, and their greater disinclination to marry their high school sweethearts, on the other.

Hypothesis: The lower pregnancy rates are mainly due to the higher contraceptive use.
Relation: neutral