Perioada fertila - calcul. Ovulatia este fenomenul de maturare (dezvoltare) si eliberare a unui ovul din ovarele femeii. In jurul datei de ovulatie este perioada fertila a ciclului menstrual al femeii, perioada in care ea poate ramane insarcinata mult mai usor. Cunoasterea acestei perioade este deosebit de folositoare pentru planificarea unei sarcini in cadrul unei familii. O sarcina apare in urma fecundarii ovulului, de catre spermatozoid, numai in zilele din jurul ovulatiei : 3 - 4 zile inainte si 1 - 2 zile dupa aceasta.
Statisticile arata ca la un ciclu stabil de 28 de zile, ovulatia apare in ziua a 14-a, considerand drept prima zi a ciclului, prima zi de menstruatie. La un ciclu stabil de 29 de zile, ovulatia are loc in ziua a 15-a, la cel de 30 de zile ovulatia apare in ziua a 16-a, si asa mai departe, constanta fiind perioada de 14 zile de la ovulatie pana la viitorul ciclu menstrual. Un ovul traieste intre 12 si 24 de ore. Apoi, daca nu este fecundat el moare si este eliminat. Your Age on Other Worlds. Want to melt those years away? Travel to an outer planet! <div class="js-required"><hr> This Page requires a Javascript capable browser <hr></div> Fill in your birthdate below in the space indicated.
(Note you must enter the year as a 4-digit number!) Click on the "Calculate" button. Notice that your age on other worlds will automatically fill in. Notice that Your age is different on the different worlds. The Days (And Years) Of Our Lives Looking at the numbers above, you'll immediately notice that you are different ages on the different planets. The earth is in motion. The top-like rotation of the earth on its axis is how we define the day. The revolution of the earth around the sun is how we define the year. We all learn in grade school that the planets move at differing rates around the sun. Why the huge differences in periods?
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