Tethered headsets are physically connected to the laptop or computer. It is a much more complex system that gives an ultimate VR experience. The VR headset for iPhones works pretty well with iPhone, giving the user an awesome virtual reality experience.
DHA (docosahexaenoic acid) is an omega-3 fatty acid often recommended to women during pregnancy. Thought to protect against a number of pregnancy-related complications, DHA is also said to promote the health of the developing child.
A lot of motion sickness medications are safe in pregnancy. Meclizine and dramamine (dimenhydrinate) are both class b which are safe in pregnancy. Wrist bands that are used for motion sickness are also totally safe in pregnancy. This is a really hard topic as most women are a little nauseated in pregnancy and travel doesn't make that better.