Low dose but reliable contraception.

The Yaz birth control pill is more than 99% effective at preventing pregnancy. It has a lower dose than many other combined pills, so isn’t as likely to cause vaginal dryness or a drop in libido.
Looking for protection that doesn’t tip the hormonal balance? We can help. Talk to our experts to get advice on what pills are out there. Order Yaz online and get your pill delivered regularly, direct to your door.
Yaz is a combined oral contraceptive pill (COCP). It’s a cyclical pill you take at the same time every day to get the most out of the treatment. There are two synthetic hormones in it that adjust the menstrual cycle and stop the body from releasing an egg for fertilisation.
A pack of Yaz pills contains 24 active and four inactive pills. The four inactive pills are spacers (pills without any active ingredient), which you take until you’re ready for the next pack. That way you keep up the habit of taking a pill at the same time each day.
There are two hormones in Yaz tablets: drospirenone and ethinyl estradiol. These are very similar to progesterone and oestrogen, hormones that naturally occur in your body.
As part of the menstrual cycle, these natural hormone levels rise and fall, kickstarting ovulation (the release of an egg) and other processes.
Yaz uses hormones to trick the body into thinking that ovulation has already happened, so no egg is released. These hormones also stop the wall of the uterus from getting thicker, which makes it more difficult for a fertilised egg to settle there. They also change the consistency of cervical fluid, so sperm can’t reach the egg in the unlikely event the first two methods have failed.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Yaz needs to be taken at the same time each day. To help you to get into the habit of doing this, taking it as soon as you wake or during a meal you have at the same time each day are handy tips for remembering when to take it. Yaz can be taken with or without food.
Each blister pack contains 28 pills. The 24 light pink pills contain the active ingredients and are taken once a day for 24 days of the cycle. This is followed by four inactive white pills taken for four days. After you’ve taken the fourth inactive pill, you start a new pack the next day.
If you miss a light pink, active tablet (tablets 1-24 of your blister strip), you should do one of two things.
If less than 24 hours have passed since you missed your tablet, your contraceptive protection isn’t affected. You should take the missed tablet as soon as possible and take any tablets that follow as normal.
If you’re more than 24 hours late taking your tablet, your protection from pregnancy could be impacted. The more tablets you’ve forgotten to take, the more likely it is that you’ll get pregnant.
Your risk of insufficient protection from pregnancy is highest if you forget to take a light pink tablet at the start or at the end of your strip.
If you’ve missed more than one tablet in a strip, you should speak to your clinician. If you forget one tablet between days 1-7 (the first row), take the tablet you missed as soon as you can, even if you have to take two tablets at the same time. You should keep taking the tablets as normal and use additional protection for the following seven days, such as a condom. If you’ve had sex in the week prior to missing your pill, you may be pregnant. You should get in touch with your clinician.
If you miss one tablet between days 8-14 (second row), take the tablet you missed as soon as you can. This may mean taking two tablets at once. Keep taking your tablet as normal. Your protection from pregnancy isn’t affected, and you don’t need to use additional contraception.
If you miss one tablet between days 15-24 (third or fourth row), you can do one of two things:
If you forget to take any of the tablets in a strip, and you don’t experience a bleed on the days you take the placebo, you could be pregnant. You should speak to your clinician before you start your next strip.
Combined birth control pills like Yaz are more than 99% effective as long as they’re taken correctly. This means that out of 100 women taking Yaz over one year, fewer than one will become pregnant. That makes it one of the most effective methods of birth control available.
With ‘typical’ use, which takes into account forgetting the odd pill every now and then, effectiveness is reduced to around 92%. That’s eight out of every 100 women becoming pregnant over one year of taking Yaz.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Have something specific you want to know about Yaz? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
Use of oral contraceptives for management of acne vulgaris and hirsutism in women of reproductive and late reproductive age. Menopausal Review, 17(1), pp.1–4.
Contraception: Do hormonal contraceptives cause weight gain? www.ncbi.nlm.nih.gov. Institute for Quality and Efficiency in Health Care (IQWiG).
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Combined pill: Here's what else we have.
Safest category combined pill, with a lower risk of oestrogen side effects. Very similar to Levlen.
Safest category pill, helps with heavy menstrual bleeding. Very similar to Nordette and Microgynon.
Pill with a 'regular' oestrogen dose. Comes in a 21 pack. Very similar to Cimizt and Gedarel 30.
Extended cycle pill that comes in a larger pack.
A triphasic pill giving you three different doses of hormones throughout the month.
Triphasic pill. Similar to Microgynon, but with phased doses to match changes during your cycle.
Well known pill that reduces PMS symptoms and can help to make your periods more regular.
Higher oestrogen dose pill, helps to make periods more regular.
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