3 months of KB has become a favorite choice for many women because it is practical and effective for anyone who wants to prevent pregnancy. However, you must understand, in order to maintain maximum protection, the schedule for injection must be done on time. Therefore, look at the maximum limit for the 3 month KB injection and how to calculate it so that it is not wrong.

Reporting from Healthdirect, contraceptive injections are a type of contraceptive (contraceptive device). The injection contains a hormone called the acetate medroxyprogesteron depot (DMPA). This hormone is similar to the progesteron hormone. To prevent pregnancy for 12 weeks, DMPA was slowly released into the bloodstream for 3 months.

Furthermore, protection is starting to decrease. You need a new injection every 3 months to prevent pregnancy. However, if your injection schedule is a little late, you should not panic. Because, there is a maximum limit for injecting late, which is 14 days from the next injection schedule.

If you are more than 14 days late, the risk of pregnancy will increase because the hormone levels in the body are not enough to protect you. Therefore, it is important for you to inject before crossing these limits.

Quoted from the NHS, contraceptive injections are not suitable for all women. This is because contraceptive injections are very susceptible to the fertility rate of women. If you stop receiving contraceptive injections, it takes up to 1 year for your fertility to return to its previous level.

In order not to be late and remain effective, below is a guide on how to calculate the KB injection schedule for 3 months:

3 months of KB injection contains a hormone progestin that works for 12 weeks (84 days). Therefore, you must get an injection before the protection from the previous injection ends.

To calculate the next injection schedule is as follows:

The date for the first injection: Take note of the date when you receive the KB injection.

Add 12 weeks: Calculate 12 weeks (84 days) from that date to find out the next injection schedule.

Examples of calculations:

If you receive the first injection on January 1, 2025, add 12 weeks:

The next injection schedule is March 26, 2025.

If you are late, there is a tolerance period of 14 days after the proper injection schedule. However, if you exceed that period, the protection of family planning can decrease, and the risk of pregnancy also increases. In this case, you can use additional contraceptives such as condoms to get new injections.

What to do if it's more than 14 days late? Do the following:

Before getting another injection, you need to first check whether there is a possibility of pregnancy. Doctors or midwives will usually ask Mothers to undergo a pregnancy test.

If you are late in injections and still want to have sex, you should use a condom first. This is important until the next KB injection is effective again (usually 7 days after injection).

You can tell a doctor or midwife about this delay. They will provide the best solution to you, including considering emergency contraception if needed.

If it is close to the date of injection, prioritize time for the midwife or doctor. This is important to do so that the schedule does not delay.

In general, health care places receive a schedule for KB injections on certain days. Determine the most comfortable day for you.

That's a review of the maximum late limit for KB injections for 3 months. Hopefully useful. Visit VOI.id to get other interesting information.


The English, Chinese, Japanese, Arabic, and French versions are automatically generated by the AI. So there may still be inaccuracies in translating, please always see Indonesian as our main language. (system supported by DigitalSiber.id)