The BBT fertility charting looks at the fluctuations in your basal body temperature to provide physical clues of ovulation. By tracking your basal body temperature (BBT) for a few cycles, you will be able to tell if you are ovulating regularly and estimate when ovulation will actually happen in your next cycle.
During the Follicular phase, i.e. the first infertile half of your cycle, your temperatures usually remain low, somewhere between 97.0o Fahrenheit to 97.8o Fahrenheit.
Just prior to ovulation, your temperature will actually come down slightly. You will most possibly ovulate on the day of your temperature dips. When you notice a temperature spike the next day, ovulation has already occurred. By the time you are able to recognize that ovulation has happened, it is usually too late to try for a baby.
After ovulation, you will enter into the second half of your cycle, the Luteal phase. During this phase, you will experience high temperature ranging from 98o Fahrenheit to 98.6o Fahrenheit. Your natural body temperature will begin to drop just before the start of your next period.
However, if you do get pregnant, your basal body temperature will remain high, ranging from 98.5o Fahrenheit to 99.2o Fahrenheit. It will remain about this high until your baby is born.
As soon as you could estimate your fertile window from your BBT charts, time your copulation accordingly to achieving a pregnancy in your next menstrual cycle. To optimize this period, start having intercourse five days before your next estimated ovulation day. Then, try to come together as frequently as you can until you have ovulated.
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