Is Birth Control Really Effective?

It was widely believed that women would know right after sex that they had conceived. But actually you wouldn't know rpregnant until quickening, when the foetus moves within the mother's body and the mother can feel that. So it seems that there was a lot of attention to er turning a woman's body to regularity in terms of mestrual flow. And once we get to the nineteenth century, especially once it's possible to buy preparations of arsenic for abortive patiens, we see really tragic results.