To cope with stress, you'll have both negative and positive coping strategies and skills to learn from. To get through stress you should try and keep a positive attitude.
A phrase to describe a negative feedback loop could be: self-regulating (though I'm not sure the exact word you're looking for).
Answer:
FHS
Explanation:
FHS (follicle-stimulating hormone) can cause a woman to have trouble conceiving if this were found in her blood in high traces
There are many reasons why Zachary can't concentrate. He might have something on his mind that is bothering him, he could be hungry, he could not have a lot of energy. The best thing Zachary could do to help the paper not suffer is leave his desk and paper alone for about a half an hour, and maybe eat something, or just take a break. Maybe take a nap to get some energy back up so that he can get everything he needs in his paper.