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.
However, like you, your unborn baby can't efficiently produce DHA and must rely on the placenta during pregnancy, and breast milk or DHA-enriched formula after birth. When you take a DHA supplement during pregnancy and nursing, it significantly enhances the level of DHA available to your baby in and out of the womb.