How to simply use your "Menstrual Cycle" to control pregnancy

The problem of unexpected pregnancy is something that brings a lot worry to couples and individuals who are not ready to give birth for one reason or the other. The natural birth control system that involves the use of the menstrual cycle is an effective means if one can understand the operations of the cycle.

Sperm can live inside your uterus for up to five days after having sex, and pregnancy can only occur if there are sperm in your uterus or fallopian tubes when you ovulate.

For many women, ovulation occurs around day 14 of your cycle. However, having unprotected sex during your period or outside of your expected fertile window may not necessarily result in pregnancy.

Women with a shorter cycle — the average is 28 to 30 days have higher possibility of pregnancy you have unprotected sex during your period. For example, if you have sex toward the end of your period and you ovulate early, you can conceive.

Relationship between ovulation and pregnancy

Ovulation occurs when a mature egg is released from an ovary. About once a month, an egg matures and is released into the fallopian tube. It then heads toward waiting sperm in the fallopian tubes and uterus. The egg is viable between 12 and 24 hours after it leaves the ovary. Sperm can also stay alive up to five days after having sex. Implantation of an egg, which happens after fertilization, usually takes place 6 to12 days after ovulation. Pregnant can occur immediately after your period. That can happen if you have sex toward the end of your cycle and are approaching your fertile window. On the other hand, the probability of getting pregnant right before your period is low.

If you’re tracking ovulation and wait 36 to 48 hours after ovulating, the chances of conceiving very is low. The probability for pregnancy decreases the further in the month you are from ovulation.

If pregnancy doesn’t occur, the uterine lining will shed and your menstrual period will start.

What is a fertile window

Tracking your fertile window is a way to determine your “optimal” time to get pregnant. It can also help prevent pregnancy if you aren’t trying to conceive.

How to track your fertile Windows

The following method will help you find out your fertile window.

1. Record the day you start your menstrual period and count the total number of of days in the cycle. The first full flow day is the day one

2. Note your longest and shortest number of days from your monthly tracking.

3. Find out the first day of your fertile window by subtracting 18 days from the length of your shortest cycle. If your shortest cycle was 27 days, subtract 18 from 27 and note it down which is day 9.

4. Find the last day of your fertile window by subtracting 11 from your length of longest cycle. For instance, if it was 30 days, 30-11= 19. Which means day 19 is the last day of your fertile Windows.

As a method of reliable birth control, it can take several months of recording your monthly cycle to figure out your fertile window.

Using the fertile window to control pregnancy

Though, you may not necessarily get pregnant throughout the fertile window, to ensure safety, avoid unprotected sex during the fertile window. Usually, ovulation will occur one day during your fertile window. The egg released is viable for 12 to 24 hours.

If you have very consistent cycles, knowing your fertile window can help prevent pregnancy. But keep in mind, your cycle days can still change each month. Factors like stress, diet, or heavy exercise can affect the number of days in your cycle. The day of ovulation can also change every month.

Tracking your ovulation is a more effective way to help you get pregnant or prevent pregnancy.


Safe days for sex using the menstrual cycle or calender methods.

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