Your cycles may change through your life so during the 5 years you have been on the pill they may indeed have got shorter. I went on the pill at 19 with a 36 day cycle. 11 years later when I came off I went back to 36 days for the 5 months before I became pregnant. After I had the baby my cycle was 28 days for the 2 and a half years before my next pregnancy.
The 14th day is when you ovulate in a 28 day cycle. Most cycles run 28-38 days and not shorter. If you are having a shorter cycle go to the doctor this isn't normal.
The: Rock Cycle Water Cycle Nitrogen Cycle Oxygen Cycle Carbon Cycle
The length of the typical menstrual cycle is 28 days. Everyone is different, some people may have longer cycles and some may have shorter cycles.
The typical menstrual cycle runs for 28 days. However - individuals may experience shorter or longer cycles.
On average, unspayed, female dogs in general have a heat cycle every 6 months. Some have longer cycles, some have shorter cycles.
Assuming you are asking what has a shorter wavelength 1 Mhz or 1 Ghz, then the answer is 1 Ghz. But the way the question was phrased, Mhz or Ghz, well 1000 Mhz is = 1 GHz. Note that 1 hz is just 1 cycle/sec. 1 Mhz is 1,000,000 cycles/sec and 1 Ghz is 1,000,000,000 cycles/sec. So to fit 1000 cycles in one second (as compared to 1 cycle in a second) the cycles have to be shorter (faster up and down sinusoidal wave).
Yes, there is a 21 day menstrual cycle. The typical cycle is 28 days but everyone is different and some people may have shorter menstrual cycles than this.
With advancing age does come shorter menstrual cycles, and furthermore menopause, but that is not the only reason why a woman can have a shorter cycle. There are studies that show that high caffeine intake shortens menstrual cycles. Shorter menstrual cycle indicates a less of a chance of getting pregnant.
All biogeochemical cycles involves living organism. Occurence of chemical change to bring about changes within the cycle.
The rock cycles are used to understand how rocks are made and how they change from metamorphic to sedamentary and so on. It is a chart to explain it.
It is warming faster than previous natural cycles.
Most often, no. The supposed "normal" length of a menstrual cycle is 28 days but most women will have shorter or longer cycles.