The rule of thumb is most women need about 300 extra calories every day during the last five to six months of pregnancy for good fetal development. This will combine to a healthy weight gain of about one pound each week.
In general, the brain can withstand up to three to six minutes without oxygen before brain damage occurs, but this may vary from person to person.If the brain goes without oxygen longer than this, serious and often irreversible damage is likely to take place.eath is usually declared once the brain has gone more than 15 minutes without oxygen. Although the brain can only go a few minutes without oxygen before some type of brain damage occurs, patients can often regain cognitive function if treated quickly.
Unconscious is not really the word you're looking for because that just implies you're not conscious. You can certainly be breathing and neurologically intact if you're just unconscious. I think what you're looking for is how long can the brain survive without oxygen.Well, it's subjective, but pretty standardly, brain tissue will start to die after 4-6 minutes without oxygen.That is a main reason why early CPR and defibrillation is KEY to survival. Even just calling 911 and doing compressions (and no breaths).nconscious is not really the word you're looking for because that just implies you're not conscious. You can certainly be breathing and neurologically intact if you're just unconscious. I think what you're looking for is how long can the brain survive without oxygen.