In the electron transport chain, electrons move through the cytochromes in the following order: b566, b562, c1, c, a, and a3 (see Figure 16-19). The various cytochromes have slightly different heme groups and axial ligands, which generate different environments for the Fe ion (Figure 16-21).
On average, a woman has her period from three to seven days and the average woman menstruates from age 13 until age 51. That means the average woman endures some 456 total periods over 38 years, or roughly 2,280 days with her period -- 6.25 years of her life. Midol. You can only take up to six caplets a day, and cramps usually persist for two days. There are 40 caplets per package of Midol, which costs $8.99 at Walgreens.
How many days should I have between periods? I don't have mine at the same time every month. The average menstrual cycle lasts 28 days; however, any cycle between 23 and 42 days is typical. Depending on how long yours actually is, you may not have it at the same each month. My cycle is about 30 days, so mine usually comes around the same date, around the eighth to the tenth day each month. You and me both!