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Birth Control


Birth control is any method used to prevent pregnancy. Another word for birth control is contraception.

If you have sex without birth control, there is a chance that you could get pregnant. This is true even if you have not started having periods yet or you are getting close to menopause.

The only sure way to prevent pregnancy is to not have sex. But finding a good method of birth control that you are comfortable with can help you avoid an unplanned pregnancy.

Be sure to tell your doctor about any health problems you have or medicines you take. He or she can help you choose the birth control method that is right for you.

Types of Birth Control

There are many different kinds of birth control. Each has pros and cons. Learning about all the methods will help you find one that is right for you.

  • Long-acting reversible contraception (LARC) is the most effective reversible method you can use to prevent pregnancy. If you decide you want to get pregnant, you can have them removed. LARCs are implants and intrauterine devices (IUDs). While they are being used, they usually prevent pregnancy for years.
    • Implants are placed under the skin of the arm. They release the hormone progestin and prevent pregnancy for about 3 years.
    • IUDs are placed in the uterus by a healthcare provider. There are two main types of IUDs—the copper IUD and the hormonal IUD. The hormonal IUD releases progestin. IUDs prevent pregnancy for 3 to 10 years, depending on the type.
  • Hormonal methods are very good at preventing pregnancy. Combination birth control pills ("the pill"), skin patches, and vaginal rings release the hormones estrogen and progestin. Shots, mini-pills, hormonal IUDs, and implants release progestin only.
  • Barrier methods generally do not prevent pregnancy as well as IUDs or hormonal methods do. Barrier methods include condoms, diaphragms, cervical caps, and sponges. You must use barrier methods every time you have sex.
  • Fertility Awareness is a type of natural family planning based on physical signs of ovulation, such as changes in cervical mucus consistency and basal (resting) body temperature, as well as the menstrual cycle (known as Calendar Rhythm Method). Keeping track of these symptoms, as well as the menstrual cycle, may be helpful if you are trying to become pregnant or trying to avoid pregnancy. If you are trying to become pregnant, having sex during the 5 days before you ovulate, and the day you ovulate, increases your chances of success. If you are trying to avoid pregnancy, avoiding sex until several days after you have ovulated helps prevent pregnancy.
  • Permanent birth control (sterilization) gives you lasting protection against pregnancy. A man can have a vasectomy, or a woman can have her tubes tied (tubal ligation). But this is only a good choice if you are sure that you don't want any (or any more) children.
  • Emergency contraception is a backup method to prevent pregnancy if you didn't use birth control or a condom breaks. The most effective emergency contraception is prescribed by a healthcare provider. This includes the copper IUD (inserted by a healthcare provider) or a prescription pill. You can also get emergency contraceptive pills without a prescription at most drugstores and sexual health clinics.

Birth control following pregnancy

Talk to your doctor about the options for birth control after your delivery. They include implants and intrauterine devices (IUDs), hormonal methods, and barrier methods. Many types of birth control are safe to use if you're going to breastfeed. But some work better than others.

Learn more


Choosing a Birth Control Method

The best method of birth control is one that protects you every time you have sex. This usually depends on how well you use it. To find a method that will work best for you, think about:

  • How well it works. Think about how important it is to you to avoid pregnancy. Then look at how well each method works. For example, if you plan to have a child soon anyway, you may not need a very reliable method. If you don't want children but feel it is wrong to end a pregnancy, choose a type of birth control that works very well.
  • How much effort it takes. For example, birth control pills may not be a good choice if you often forget to take medicine. Or, if you are not sure you will stop and use a barrier method each time you have sex, pick another method. Diaphragms and cervical caps are not widely available in Canada. Buying the necessary spermicidal jelly to use with them is difficult.
  • How much the method costs. For example, condoms are cheap or free in some clinics. Some health plans cover the cost of prescription birth control. But cost can sometimes be misleading. An IUD costs a lot up front. But it works for years, making it low-cost over time.
  • Whether it protects you from infection. Latex condoms can help protect you from sexually transmitted infections (STIs), such as herpes or HIV/AIDS. But they are not the best way to prevent pregnancy. To avoid both STIs and pregnancy, use condoms along with another type of birth control.
  • Whether you've had a problem with one kind of birth control. Finding the best method of birth control may involve trying something different. Also, you may need to change a method that once worked well for you.
  • Whether you want children. If you are positive you don't want children, a lasting method of birth control might be best.
  • Your health issues. Some birth control methods may not be safe for you, depending on your health issues. For example, women who smoke, are breastfeeding, or have had breast cancer may not be able to use certain methods.

Time and effort to use

Birth control must be used correctly in order to prevent pregnancy. When you decide which birth control method to use, be honest about how much effort you are willing to put into birth control. If you aren't comfortable with or might not consistently use a birth control method for any reason, that method isn't likely to be reliable for you in the long run.

Some birth control methods require more effort than others.

  • Long-acting reversible contraception (LARC) (such as implants, hormonal IUDs, and copper IUDs) works to prevent pregnancy for 3 to 10 years. In some cases it can be used longer.footnote 1, footnote 2 Talk to your doctor about how long you can use it. After it's in place, you don't need to do anything.
  • Barrier methods (including the diaphragm; cervical cap; male condom; female condom; and spermicidal foam, sponge, gel, suppository, or film) can interrupt sex. And you have to use them every time you have sex. Diaphragms and cervical caps are not widely available in Canada. Buying the necessary spermicidal jelly to use with them is difficult.
  • Combination pills are taken each day. Progestin-only pills must be taken at the same time each day. If you miss a pill, you'll need to use a backup birth control method.
  • Patches are replaced 3 times each month.
  • Vaginal rings are inserted into the vagina 1 time each month.
  • Fertility awareness requires that a couple chart the time during a woman's menstrual cycle when she is most likely to become pregnant. The couple must avoid intercourse or use a barrier method during that time.
  • Sterilization is a surgical procedure. It's done for men or women who decide that they don't want to have any (or more) children. It's intended to be permanent.

Health issues that might limit your choices

If you have health problems or other risk factors, some birth control methods may not be safe for you. To make sure a method is right for you, your doctor will need to know if you:

  • Smoke. If you smoke more than 15 cigarettes a day and are 35 or older or have high blood pressure, a history of stroke, a history of blood clots, liver disease, or heart disease, you may not be able to use combined hormonal methods.
  • Have any serious health problems, such as heart disease, high blood pressure, diabetes, or migraine headaches.
  • Have had blood clots in the legs (deep vein thrombosis) or lungs (pulmonary embolism), or have a close family member who had blood clots in the legs or lungs.
  • Are pregnant.
  • Have just delivered a baby. If you just had a baby, the estrogen-progestin methods of birth control aren't recommended in the first few weeks.
  • Have breast cancer or a history of breast cancer.
  • Have a sexually transmitted infection (STI).

Learn more

Emergency Contraception

Emergency contraception is a way to prevent pregnancy if:

  • you’ve had unprotected sex
  • you’ve been sexually assaulted
  • used the withdrawal (pulling out) method
  • a condom broke, leaked, slipped, or fell off
  • your method of birth control wasn’t used the right way, or you are taking other medicines that may affect your birth control

The most effective emergency contraception is prescribed by a healthcare provider. This includes the copper IUD (inserted by a healthcare provider) or a prescription pill. You can get emergency contraceptive pills (morning-after pills or plan B) without a prescription at most drugstores and sexual health clinics.

If you have unprotected sex, use EC as soon as possible. If you are already pregnant and use EC pills, they will not stop a pregnancy. Emergency contraception does not protect against sexually transmitted infections.

Learn more

How to Get Birth Control

  • You can buy:
    • Condoms, sponges, and spermicides without a prescription in drugstores, online, and in many grocery stores.
    • Some forms of emergency contraception without a prescription at most drugstores and sexual health clinics.
  • You need to see a doctor or visit a sexual health clinic to:
    • Get a prescription for birth control pills and other methods that use hormones.
    • Have an implant or IUD inserted, including the type of IUD used for emergency contraception.
    • Get a hormone shot.
    • Get a prescription for a diaphragm or cervical cap. Diaphragms and cervical caps are not widely available in Canada. Buying the necessary spermicidal jelly to use with them is difficult.
    • Get a prescription for certain kinds of emergency contraception.

When to Call a Doctor

Call 911 or other emergency services if you have:

  • Sudden, severe chest pain.
  • Difficulty breathing.
  • Sudden, severe headache.

Call your doctor now if you:

  • Have severe pain in your belly.
  • Have headaches that:
    • Happen more often.
    • Are getting worse.
    • Start with auras, such as seeing spots, wavy lines, or flashing lights. Your hands, arms, or face may tingle or feel numb.
  • Have signs of a blood clot, such as:
    • Pain in your calf, back of the knee, thigh, or groin.
    • Redness and swelling in your leg or groin.
  • Feel depressed.
  • Have heavy or prolonged bleeding.
  • Think you may be pregnant.
  • Notice yellowing of your skin or eyes.

It's common to have mild headaches, mild nausea, mild breast tenderness, or irregular bleeding (spotting) when starting birth control. These mild symptoms should improve over time. If you have problems with a birth control method, talk with your doctor. They may recommend another birth control method or help you solve the problem you are having.



  1. Thaxton L, Lavelanet A (2019). Systematic review of efficacy with extending contraceptive implant duration. International Journal of Gynaecology and Obstetrics: The Official Organ of the International Federation of Gynaecology and Obstetrics, 144(1): 2–8. DOI: 10.1002/ijgo.12696. Accessed December 7, 2022.
  2. Ti AJ, et al. (2020). Effectiveness and safety of extending intrauterine device duration: A systematic review. American Journal of Obstetrics and Gynecology, 223(1): 24–35.e3. DOI: 10.1016/j.ajog.2020.01.014. Accessed August 29, 2022.


Adaptation Date: 4/5/2023

Adapted By: Alberta Health Services

Adaptation Reviewed By: Alberta Health Services

Adapted with permission from copyrighted materials from Healthwise, Incorporated (Healthwise). This information does not replace the advice of a doctor. Healthwise disclaims any warranty and is not responsible or liable for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.