Low tech is too old tech
The moral of the story: if you you're trying to get pregnant, or not, the old ways are sometimes the best, or at least much cheaper.
At least environmentally it is a real kicker. Plastics and electronics are nicely poor on the scale of environmentally sound. The trend of the time is to secure your as-yet-unborn child with a good head start at a large environmental footprint. And also, please make sure that the as-yet-unborn child is getting used to high tech requirements of modern times. Low tech is only for old people.
(I heard that a smartphone for prenatal use is in the makes; implantable and complete with gaming and xflix subscriptions, including ads for the unborn child)