An important quote about this in "Herland" is the one that initially sets up the mood and tone and image of Herland in the minds of the male travelers, one of whom is the narrator who says that we would never believe what the women of Herland looked like.
We ... pumped the man for further information. He could tell us only what the others had -- a land of women -- no men -- babies, but all girls. No place for men -- dangerous. Some had gone to see -- none had come back.