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A birth rate is a number of births that occur in a period of time in a given area.
1300s through 1500s
1500s
1920's
never say never.
There is no 'safe' period. Pregnancy can occur at any time during your menstrual cycle.
1692-1693
extinction
Hi, Your period will usually occur during the period you take the non-active pills or have a break from taking your pills. The break lasts for 7 days and your period will occur any time during the 7 days.
Yes, it can occur at any time even during your period. And has even been known to happen while on birth control.
A wave's period and frequency have an inverse relationship - as the frequency increases, the period decreases, and vice versa. Frequency is the number of wave cycles that occur in a unit of time, while the period is the time it takes for one complete wave cycle to occur.
The inverse of period is frequency. Period refers to the time it takes to complete one cycle of a repeating event, while frequency represents the number of cycles that occur in a unit of time.