FISH of <i>T. urticae</i> females who were pregnant or were laying an egg.

<p>(A, B) <i>Wolbachia</i> (arrow) concentrated in the developing embryo in the female abdomen (combined Z sections). (C, D) <i>Wolbachia</i> (arrow) were transovarially transferred from the mother to the offspring through the egg (combined Z sections). Right panels, bright field and fluorescence; left panels, fluorescence only.