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If shortness of breath persists for 10 minutes or longer after exercise, or if it becomes impossible to breathe, a person should seek immediate medical attention.

The number of circulating red blood cells is measured by hemoglobin, a protein that enables red blood cells to carry oxygen to tissues.

Signs and symptoms include pale skin, weakness and fatigue.

If your ovaries don't release an egg ovulate during a menstrual cycle anovulation , your body doesn't produce the hormone progesterone, as it would during a normal menstrual cycle.

— De'angelo Epps, Wired, 27 Apr.

Fever or overheating are possible causes of heavy breathing.

This leads to hormone imbalance and may result in menorrhagia.

Blood levels in children should be reduced below the levels so far considered acceptable, recent data indicating that there may be neurotoxic effects of lead at lower levels of exposure than previously anticipated.

Some common lung-related causes of breathing difficulties :• — Nicholas Mcgee, Forbes, 20 June 2021 Torres and junior Maura Murphy three goals, assist, five draw controls did most of the heavy lifting in terms of consistently winning possession.

Recent Examples on the Web And while none of these films require much heavy lifting in the brain-muscle department, F9 may be the most impressionistically blockheaded yet.

— Idrissa Simmonds, Wired, 19 May 2021 These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heavy.