Just after ovulation, the amount of mucus decreases and becomes thicker. This consistency makes it easier for the sperm to travel through the cervix to the egg. In the few days leading up to ovulation, the amount of discharge increases and becomes thin, slippery, and stretchy (like egg whites). Over the course of your menstrual cycle, the amount, color, and texture of your cervical mucus changes due to fluctuating hormone levels. Medications: Some medications, such as antibiotics or blood pressure medicines, can cause a rise in BBT.ĭisease: Thyroid disorders can cause your bodys temperature to increase.Įxertion or heat: Exercise and hot weather can push your temperature up. If you dont take your temperature immediately after waking up, your BBT chart will not be accurate.īut the day after you ovulate, you should see an uptick of 0.5 to 1.0 degree in your BBT, which should last until your next period.įever: Having a fever (if you get sick with the flu or another illness) will raise your overall body temperature, so your BBT wont be reliable. Try to take a reading at about the same time each morning, and record it on a BBT chart (see below). You can buy glass or digital BBT thermometers in your pharmacy or online.Īlthough some digital ones give readings to a hundredth of a degree, all you really need is one that will give a reading to one-tenth of a degree (thermometers that only give readings to two-tenths of a degree are not accurate enough). Nevertheless, if you have regular menstrual cycles and chart your BBT over time, this method may help you predict when youll be most fertile.

So when you detect a temperature change, your optimal window for getting pregnant will likely have already passed.

For greater accuracy, you can combine tracking your BBT with monitoring changes in your cervical mucus.

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