Cover legend: GABA_A receptor δ subunit expression in the hippocampus. Color-transformed images of GABA_A receptor δ subunit expression in the hippocampus of a virgin wild-type mouse (left panels) and pregnant mice (right panels), show a high density of expression in the dentate gyrus molecular layer in wild-type mice. GABA_A receptor δ subunit expression is reduced in hippocampus during pregnancy. For more information, see the article by Maguire et al. in this issue (pages 9592–9601).