Intrauterine devices (IUDs) contraception.
Intrauterine devices are small devices that you can insert into your uterus (i.e., your womb) in order to prevent pregnancy. The two main types of IUDs are the copper IUD and hormonal IUD (the latter being sold as IUD Mirena or “mini Mirena” called Kyleena IUD). These devices are highly effective and can stay in the same place inside your body for up to 5 years (for the Kyleena), up to 7 years (for the Mirena) and up to 10 years (for the copper IUD).
The copper IUD is designed to release copper into your womb, while Mirena IUD continually releases progestogen (a hormone that is created by the ovaries). The Kyleena IUD releases progestogen as well, however in a much lower dosage than the Mirena IUD.
All three are very useful to prevent pregnancy, with the IUD failure rate being about 0.1%. The Mirena IUD will also help if you have heavy periods as it makes periods much lighter and more manageable. You can remove each of these devices at an earlier time if required. They don’t need to stay in your body for the full 5 or 10 years.
Birth control pills.
Oral contraception, commonly known as birth control pills, the combined pill or simply ‘the pill’, is another highly effective contraceptive method. They are tablets containing both progestogen and oestrogen which you take every day, and they work by stopping ovaries from releasing an egg every month.
When taken correctly, birth control pills are 93% – 99.5% effective at preventing pregnancy. However, they might not work if you miss a pill, take it over 24 hours late, vomit within the first few hours after taking it, have diarrhoea or if you’re taking some other medication.
Mini pills
The mini pill is another kind of oral contraception, but it only contains progestin. It does not contain estrogen. It acts by thickening the cervical mucus in your body and thinning the womb lining and thereby stopping sperm from reaching your eggs. You will need to take most mini pills exactly at the same time every day to boost their effectiveness as much as possible. Newer generation Progesterone only pills like Slinda (Drospirenone), a recent addition in Australia, are more reliable than older generation progesterone only pills.
You may need to use the mini pill instead of the traditionally combined pill if you are breastfeeding, have experienced certain health problems (such as a history of blood clots) or are generally worried about taking estrogen.
Note that oral contraception (including both the mini pill and combined bill) does not protect against sexually transmitted diseases (STDs). For that, barrier protection is more effective which we will discuss below.
Barrier methods
There are a range of methods that involve creating a literal physical barrier to stop sperm from entering the uterus. It’s important that these methods are used correctly during sexual intercourse.
Barrier methods of conception include using:
- Male condoms. This involves placing a thin layer of rubber or plastic around the erect penis during sex. This is not only effective to prevent pregnancy but also useful to protect against STDs.
- Female condoms. This is a thin pouch made of plastic that lines the vagina. It’s held firmly in place by a ring at the cervix (an ‘inner ring’) and at the vagina’s opening (an ‘outer ring’). Female condoms offer some protection against STDs.
- Diaphragms are small devices shaped like a dome. They are made of latex and silicone and are designed to fit inside the vagina and cover up the cervix. They are to be used with spermicide (a substance that kills sperm). There is only one type of diaphragm available in Australia, known as Caya. The diaphragm does not protect against STDs.
- Contraceptive sponges. Commonly referred to as simply the ‘sponge’, these are round devices made from a soft foam that also have spermicide on them. You insert them into the vagina, covering the cervix and thereby preventing the sperm from entering into the womb. You are to place this up to 24 hours before sexual intercourse and leave it in about 6 hours after sex.
- Cervical cap. This is a small dome made of plastic that can fit over your cervix and stay there through suction. Once again, this is to be used with spermicide.