preventing fertility

Overview

Birth control, also called contraception, is any method used to prevent pregnancy. It works by stopping an egg from being released, blocking sperm, or preventing a fertilized egg from attaching to the womb. There are many different methods, and you can choose one that fits your health, lifestyle, and plans.

Yes. Millions of people around the world use birth control to plan if and when they become pregnant. Unintended pregnancy is common, and access to reliable contraception helps people take control of their reproductive health.

Birth control is used by people of reproductive age who do not currently want to become pregnant. A healthcare provider can help you decide which method is safe and suitable for your personal health history.

Symptoms

Common symptoms

• Irregular bleeding or spotting (especially in the first few months of a hormonal method)
• Breast tenderness
• Nausea or headaches (mainly with hormonal methods)
• Mood changes

Symptoms in children

• Not applicable. Birth control is not an illness, and this topic relates to people of reproductive age.

Symptoms in older adults

• Not applicable in the same way. Women approaching menopause may still need birth control until they have gone 12 months without a period (if over 50) or 24 months (if under 50).

Causes

Main causes

• Unprotected penis-in-vagina sex is the main way pregnancy occurs.
• Using a method incorrectly — for example, missing pills, applying a patch late, or using a condom that slips or breaks.
• Having sex without any birth control while you are fertile.

Risk factors

• Not using any method consistently
• Using methods that need daily attention, such as the pill
• Being overweight — some methods may be slightly less effective at higher weights (your provider can advise)
• Taking medicines that interact with hormonal birth control — ask your pharmacist about interactions

When to see a doctor

See a doctor urgently if:

• If you have any of the emergency symptoms listed above
• If you think your birth control has failed (for example, a condom broke or you missed several pills) and you need emergency contraception — call your provider or a sexual health clinic within 5 days

Book a routine appointment if:

• Before starting any new birth control method
• Once a year for a contraceptive review
• If you want to switch methods
• If you have side effects or mood changes that are bothering you

Diagnosis

Choosing and starting birth control does not require a diagnosis. Your healthcare provider will talk with you about your health, medical history, lifestyle, and preferences to recommend methods that are safe and suitable for you.

Tests that may be done

• Blood pressure check
• Weight measurement
• Pregnancy test to make sure you are not already pregnant
• STI screening if you have new or multiple partners

What to expect at your appointment

Your provider may ask about your periods, medications, smoking, migraines, and family health history. Some methods can be started immediately; others may need a follow-up appointment or a prescription.

Treatment

There is no single “best” birth control method. The right choice depends on your health, how often you have sex, whether you need STI protection, and how long you want the method to last. You can often switch methods until you find the one that suits you best.

Self-care at home

• Use a new condom every time you have sex — they are the only method that also protects against STIs.
• Track your fertile window with calendar, temperature, or cervical mucus changes if you prefer a non-hormonal, natural approach.
• Set a daily alarm or use a reminder app if you take the pill at the same time each day.
• Keep a backup method, like condoms, in case you miss a dose or experience vomiting or diarrhea with hormonal methods.

Medical treatments

Healthcare providers can offer prescription methods, including the combined pill, progestogen-only pill, contraceptive patch, vaginal ring, hormonal implant, hormonal intrauterine device (IUD), and contraceptive injection. They can also fit a copper IUD, which contains no hormones, or provide emergency contraceptive pills for use after unprotected sex. Your provider will explain how long each method lasts, how effective it is, and how to stop or remove it if you change your mind.

When is surgery considered?

Permanent options include female sterilisation (blocking the fallopian tubes) or male sterilisation (vasectomy). These are intended to be irreversible, so they are only for people who are certain they do not want children or additional children in the future.

Living with this condition

Using birth control becomes part of your routine. Some methods need daily attention, while others work for months or years. Keep a spare pack or extra condoms nearby, and make a note to refill or replace your method before it runs out.

Lifestyle tips

• Keep condoms accessible so you can use them even when sex seems spontaneous.
• Tell your pharmacist about any new medicines you take if you use hormonal birth control.
• If you smoke and are over 35, some hormonal methods may have extra risks — discuss this with your provider.

Diet and exercise

There are no strict diet rules for most birth control methods. Weight changes can happen with some hormonal methods, and this varies from person to person. Eating a balanced diet and staying active support overall health and can help you manage any changes in weight or energy.

Mental health and emotional wellbeing

Hormonal birth control can affect mood in some people. If you feel depressed, anxious, or notice changes in your emotional state after starting a method, talk to your provider. Switching methods often helps, and you should never feel you have to tolerate a method that makes you feel unwell.

Prevention

This topic is about prevention itself. Unintended pregnancy can be prevented by using effective contraception correctly and consistently. No method is 100% perfect, but many are over 99% effective when used as directed.

Vaccines

No vaccine prevents pregnancy. However, the HPV vaccine helps protect against cervical cancer and other HPV-related health problems — ask your provider about it.

Screening programmes

Regular STI screening is important, especially if you have new or multiple partners. Some STIs can damage future fertility if left untreated.

Complications

If left untreated

• Unintended pregnancy can have physical, emotional, and social consequences.
• Using no barrier method increases the risk of sexually transmitted infections.
• Some birth control methods may have side effects that require switching methods or medical review.

Long-term outlook

With so many safe and effective contraceptive options available, most people can find a method that fits their life. If one method does not suit you, another likely will. Talking openly with your healthcare provider is the first step to making a confident choice.

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