1.   Tests showed that her estrogen levels were fluctuating between normal and low, while her testosterone levels were consistently low.

2.   The other vignettes unfold with a dull sameness, their dynamic levels barely fluctuating, even as emotions intensify.

3.   This is largely because hormone levels fluctuate widely and no single test accurately reveals the need for treatment.

4.   Cheney has moved in and out of public view as threat levels have fluctuated.

5.   Cholesterol levels can fluctuate wildly during puberty, which means high or low results could change with adulthood.

6.   Researchers say the level of abuse fluctuates greatly, washing over communities like a wave and then dissipating.

7.   Researchers say the level of abuse fluctuates greatly.

8.   Because haemoglobin levels fluctuate naturally, an athlete has more than one chance to come in under the maximum limit before being excluded from an event.

9.   With reserves cut to a minimum, production levels fluctuate to suit changes in demand.