This question identifies a key gap in the government's proposal. The scientific evidence does indeed point to exposure in the womb as a time of high vulnerability, perhaps the most important time for exposures that may contribute to later-life cancers in their children. Since there are readily available alternatives to polycarbonate (#7) plastic water bottles, pregnant women can easily avoid these exposures. While the government hears the public's views about whether this ban should go further, pregnant women can switch to bottles made of stainless steel or glass. For plastic options, reusable containers made from #4 and #5 plastics are a better choice. For more information on choices about plastics, see the Smart Plastics Guide.