Cover picture: SHG (violet) and TPEF (green) optical section from tubulin structures in C. elegans embryos taken within the uterus of a live mother allow comparison between signal profiles for the two imaging modes. Eight embryos are shown at low magnification. Stages seen include pronuclear rotation in the zygote (far left), mitosis in the first cell division (far right), interphase in the two-cell stage (second from left), as well as various stages of early embryonic cleavage. See the article by Campagnola et al., pp. 493-508.