No. Periods can fluctuate due to stress, being more sexually active than normal. Also hormones are to be accounted for. Our bodies change every 7 years. Women from as young as 35 up can be pre-menopausal (periods are irregular) until they reach menopause where their periods cease. It's a good idea to get a good physical each year and a pap test.
no cycles vary
when a person has fewer red blood cells than normal his or her color is yellowish
a fewer? you mean fever? ITS NOT UNCOMMON. But its a sign of infection or abcess.
the rod and thunder
they would be underweight because they would have fewer villi and it is FEWER than normal
It could mean that the receptors for this hormone are not as active as should be or fewer in number than should be.
Fewer subways
fewer than 40 bpm
fair white
Yellowish
No, it means more vibrations in a given period of time.
Helium is a lighter element compared to air, helium also has fewer molecules than air.
Because they are a normal species and normal species usually have babies and you spelled babies wrong!