Having unprotected sex is not something that is recommended, but sometimes it just happens, and it's reassurring to know that there is something you can do after unprotected sex to prevent pregnancy. Emergency contraception can be used when:
- you've not used a condom or other protection
- your condom breaks or falls off
- your diaphragm was used incorrectly or became dislodged
- you've missed more than 1 birth control pill or took it late – this depends on what part of the packet you were up to
- you've been vomiting or had diarrhoea while on the pill
- you've missed your contraceptive injection (Depo-provera) or your IUD has fallen out
- you've been forced to have sex without contraception.
There are two main types of emergency contraception:
- the emergency contraceptive pill (ECP) and
- the intrauterine contraceptive device (IUD).
The ECP
The ECP is also known as the 'morning-after pill'. It is not intended for use as a regular method of preventing pregnancy because it:
- is not as effective as other methods of contraception
- may cause more side effects
- does not protect you against sexually transmitted infections
- does not protect against future pregnancies.
You have up to 72 hours after unprotected sex to take the ECP, although it is most effective if taken within 12 hours. A large study showed that 98.5% of women who have taken the ECP within 72 hours of unprotected sexual intercourse will not become pregnant.
The ECP:
- does not make it harder for you to get pregnant next time
- won't cause harm if you use it more than once
- won't cause an abortion if you are already pregnant.
Side effects of the ECP
A few women have mild side effects from the ECP – such as feeling sick or vomiting.
- If you vomit within three hours of taking the ECP, you should see your pharmacist, doctor, or Family Planning clinic for advice and further tablets
- A pharmacist can also supply tablets to prevent nausea and vomiting associated with taking the ECP, but not everyone will need these
- Other possible side effects include tender breasts, headaches, lower abdominal pain, dizziness and fatigue
- Your next period may be later or earlier than usual, or there may be spotting or irregular bleeding before your period occurs.
The IUD
This device is inserted through the cervix and into the uterus (womb). it works by preventing fertilised eggs from attaching to the womb lining. A copper IUD inserted within five days of unprotected sexual intercourse has almost 100% effectiveness but must be fitted by a doctor or at a Family Planning Clinic.
More information if you have missed taking your regular contraceptive pill
If you missed a dose of your regular oral contraceptive pill, or took it late, the action you should take depends on the type of pill you use. It also depends on how late you are in taking the pills, or how many you missed.
Check the product information for your pill or ask your pharmacist or other health professional for advice. You may need to use additional protection, such as a condom, for a while. You may also need to consider using emergency contraception if you have had unprotected sex in the previous seven days.