Often one could cite  many reasons why you might have become pregnant, and the following will mention six main reasons why your contraceptives might not have worked.
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One of the main problems regarding almost all contraceptive failures are about the improper use of the chosen method. Quite often  it is difficult for women to remember the contraceptive or perhaps it was just something that was forgotten in the moment. Either way, pregnancy was the result.

It is very important that instructions for contraceptives have to be adhered to very strictly. One example of this is that the pill has to be taken at the same time everyday and if there is a cycle to it, it needs to be taken in the exact cycles. As with all medications, contraceptives have instructions and to prevent failure, it is vitally important to read and follow the instructions exactly.  Other contraceptives such as condoms, have basic instruction such as never reuse them; use them properly and check for good condition. As well other contaceptive methods such as diaphragms or cervical caps need to be placed properly into your cervix area and have to have good coverage of your cervix. There are instructions for IUDs, it is important to follow your doctor’s recommendations, advice and it is very important to visit all the required checkups set by your physician’s reception.

Another huge problem is consistency. It is very important to be consistent when using your contraceptive. There is no doubt that you take your chances if you only take the pill on days you remember. One definitely has to take the pill on all days or at least on days of the cycle. Contraceptives must to be taken or used on all days. It is true that there are only a few days that the female body is not fertile and those are very difficult to determine, contraceptives need to be taken as written down in the instructions as well as remaining consistent.

Another reason for contraceptive failure is the broken condom. Broken condoms make up for a small percentage of all surprise pregnancies, but are not as uncommon as you might think. Even though condom makers test their condoms for a great stretch. Nevertheless they can be used improperly or come in contact some sharp object so that it breaks. This isn’t such a common reason for failure, but nevertheless it is one reason.

A fourth reason why that contraceptive you used failed is the use of other medications that might interfere with the contraceptive. Certain drugs and medications can change or reduce the contraceptives power. This mostly happens with certain antibiotics and particular herbs. It is always wise to be aware of what you take or what else you might have to use to prevent pregnancy when having intercourse.

The next relates to ignorance. People believe that they cannot get pregnant while they are having their period. However this is not so. There is no doubt that if  you have unprotected sex while having your period, you can become pregnant.

Finally, another big group of surprise pregnancies comes from nursing moms. That‘s correct. It is a well-known myth that you cannot get pregnant while nursing. But as with so many myths it is not totally true. Nursing does produce certain hormones in the female body that reduce the fertility and it is less likely to get pregnant.  However this does not act  like a contraceptive and getting pregnant is what could result if you do not use proper contraceptives.