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.
No, a woman's body can make DHA from the ALA in flaxseed oil, especially during pregnancy, when estrogen levels are highest. Pregnant women need at least 5 flaxseed oil capsules a day, however, to get enough ALA for their bodies to make the DHA they and their babies need.