This takes into account the premise that the lifespan of the sperm in the reproductive canal is 3 to 5 days. This method calculates that ovulation occurs onthe 19 th day. Therefore, fertilisation can occur until the 20th day of the cycle. Since all these calculations are an approximation, and the results can vary from woman to woman.
Cycle calculators are accurate in most cases. However, many people find these calculators and apps very complex. Also, most of the information that they ask to calculate the infertile period, — for example, months of data about body temperature, cervical mucus and dates of menstruation — may not be readily available with every woman.
Put simply, to use these calculators, you would need data about your periods as well as body temperature handy. Therefore, many people prefer using simpler period calculators like the ones below, which do not ask for months of data but still give accurate results. Avoid your fertile period. Remember, safe days depend on different cycle lengths. The following table lists the most fertile days for various cycle lengths. If you do not want to get pregnant, you need to avoid intercourse on the following days:.
Use this formula: Subtract 18 days from the total days of your shortest cycle. Using the resulting number, count from the first day of your next period and mark that date on your calendar. Subtract 11 days from your longest cycle. Using that number, count forward from the first day of your next period. Mark that date on the calendar. Your most fertile period is between those marked dates. It should be safe to have unprotected sex any time other than on those dates. However, bear in mind that sperm live up to 4 days, so count four days on either side as risky too.
Note that this only works if your periods are regular. You need to ask your doctor about the efficiency of natural family planning methods. The doctor will do a check-up and let you know if these would be effective for you. Use the safe period calculator as a natural birth control method only after your doctor gives the go-ahead.
If your menstrual cycle is regular and falls in the average range of 26 to 32 days and if the variation between your longest cycle and your shortest cycle is about seven days, you should be reasonably safe using the safe period calculator method as birth control.
Applying the same rule as above—if you are in the regular day to day cycle and the variation between your longest and your shortest cycle is more than eight days, then it would be risky to use this method. Do remember that because of hormonal changes, it would be wiser to wait for six months after childbirth to use this method.
Also, because of erratic cycles, this method is not suitable for teenagers or women on the verge of menopause. This method might not work for women who have erratic cycles because of conditions like PCOS and hormonal imbalance.
Your body demonstrates various signs in the ovulation phase. If you recognise these signs and avoid sex when you see these signs, you can avoid pregnancy. This is also called natural family planning.
Charting your basal body temperature is quite easy. To put it simply, what you do is take your temperature first thing every morning and plot it on a chart. However, the success rate depends on how well you calculate the safe period and how religiously you follow it. Once you figure out how to track the signs of fertility , you can safely indulge in unprotected sex during the infertile period. If you think you are at risk of being fertile, use protection or abstain.
It is important to remember that no method is fool-proof. The colour of cervical mucus changes when you are ovulating. Note the colour of cervical mucus every day. A change in colour would indicate that you are in the ovulation phase. A combination of multiple methods, this involves tracking ovulation symptoms like pain in the abdomen, heaviness and tender breasts, in addition to body temperature and the colour of the mucus.
As for those seeking to use the cycle to avoid pregnancy, the odds are not good. With cycle day one being the day of the actual onset of menstrual bleeding, the researchers showed that 2 percent of women were starting their fertile window by day four, 17 percent by day seven. More than 70 percent of normal women were in their fertile window before day 10 or after day 17, leaving few universal "safe" days for such natural birth control systems as the "rhythm method.
To obtain precise fertility information, the study required that the women volunteers provide daily urine samples that the researchers could test for estrogen and progesterone.
An abrupt change in the ratio of these hormones marks the event of ovulation. This signal was used to identify days of ovulation during menstrual cycles. In previous reports, Wilcox and colleagues had shown that the fertile window spans six days, ending with the day of ovulation. In the new report they find that sporadic late ovulation occurs even in women who say their cycles are usually regular. Ovia also offers other tips and statistics for all things menstrual symptoms, period length, etc.
This easy-to-use app helps you predict your next period as well as ovulation. You can track all sorts of other relevant information too, like sexual activity, temperature, and weight.
This app predicts ovulation by checking your basal body temperature. As mentioned above, having regular cycles can make a world of difference in effectively tracking your cycles. Everybody and every body is different.
And external factors can throw a wrench in your monthly regularity. Heavy exercise, diet, and stress all play a part in the length of your cycle.
Getting to know your basal body temperature can help you know when your body is ovulating. Keep in mind, this method requires reinforcements, specifically a special basal temperature thermometer. Keep track of your temperature first thing when you wake up, before you start moving about. During ovulation, it should rise ever so slightly, by 0.
When you ovulate, your estrogen levels increase, which causes your cervix to produce mucus. The following process will look very familiar to what was outlined above. Start by noting the first calendar day of your flow day one. Next, note the first day of your next period. Then, count the number of days between each cycle start day. Subtract 11 days from the duration of your longest cycle, and 18 days from the shortest one.
This represents the first and last day of your fertility window. Based on this method, you get The Standard Days method is sort of like a streamlined calendar method.
It only works if your menstrual cycle is incredibly regular — as in, your cycles are never shorter than 26 days or longer than According to the Standard Days method, you simply refrain from vaginal sex on days 8 to 19 of your cycle. Mind you, other kinds of birth control like condoms are always an option on those days.
You might find it helpful to rely on an app to help you keep track of your cycle with the Standard Days method. A lot of women opt for CycleBeads , which are exactly what they sound like: a string of 33 colored beads with a black rubber band that you can adjust from bead to bead. There are so many birth control options to choose from if you want to be extra safe.
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