Gestation Calculator

This calculator has been designed to give you an idea of the treatment options available to you*. If you decide to have an abortion with Marie Stopes UK, one of our nurses will give a more approximate gestation date during your appointment by way of a scan.
*Please note that this online calculator will only give you an estimated gestation based on the details you have provided.

Please select the first day of your last menstrual period.



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Call us now on 0345 300 8090 or email services@mariestopes.org.uk

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Buying the abortion pill online

We do not recommend that you take medical abortion pills without being under the supervision of a trained family planning professional.

The abortion pill online

You should only take medical abortion pills if they have been prescribed to you by a qualified health professional. Do not purchase so-called ‘abortion pills’ online - they may not be suitable and you may be risking your health. We would advise that you phone Marie Stopes UK before taking your first set of tablets. Please remember that in the vast majority of times, if you are from the UK, you can have an abortion on the NHS via Marie Stopes UK. 

You can receive safe, free and confidential treatment at one of our Marie Stopes UK centres and clinics with minimum waiting time for an appointment. Find an abortion clinic near you. 

The best way to find out if you qualify for NHS-funded treatment is to call our advice line on 0345 300 8090 (24h).  If you live abroad or do not qualify for NHS-funded treatment, you can decide to use our services privately. 


If you have taken the first abortion pill and are concerned, please call our advice line on 0345 122 1441 or email services@mariestopes.org.uk

You can also see your GP. 

Please read our Medical abortion explained section for in-depth information and advice. 

If you're unsure whether you want an abortion, we can provide abortion counselling

Need to talk about your options?

Our caring, specialist staff are on hand 24/7 to offer expert advice and support – from your initial consultation to treatment aftercare.

Call us now on 0345 300 8090 or email services@mariestopes.org.uk