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.



We are here to support you 24 hours a day, 7 days a week

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

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Our Expertise and our Centres

Marie Stopes UK is the most experienced abortion provider in the UK with a unique 24 hour support and telephone advice service. Our aim is to ensure women's fundamental rights to make choices around their body and their reproductive health and feel confident around these choices.

Our Expertise

We are passionate about our clients’ care and wellbeing, and we’re proud to say that 98% give our service the highest ratings. From the moment someone dials our number or walks through our door, they’re in safe, caring hands. Thanks to the skill and expertise of our staff, our clinical abortion services are the highest quality and the safest in the country.

We have an excellent compliance record with the Care Quality Commission and work very closely with the NHS to develop best practice and we constantly strive to provide a better service and experience for women.

The History of Marie Stopes UK

Dr Marie Stopes was a pioneer of family planning and women’s rights who set up the UK’s first family planning clinic. The clinic that she established was taken over by our founder and visionary Dr Tim Black in 1976 when he founded the modern organisation, Marie Stopes International, which bears her name. It was in 1973 that Dr Tim Black stepped in to save the ailing Marie Stopes Clinic in Central London, which was once the Mothers’ Clinic set up by Marie Stopes. From that point onwards, our network of clinics kept on growing. Dr Black was a pioneer who built the organisation using a commercial business model to help and support women all around the world access support and treatment that was so badly needed. This approach allowed him to grow the enterprise so that he was able to open more clinics around Britain within a year, serving the previously unmet needs of thousands of women.  Marie Stopes International was founded in 1976 by Dr Tim Black, CBE and his wife Jean. Their vision was to make family planning services available to women and men around the world, based on their experiences of travelling to countries in Africa and Asia and seeing the impact of unplanned pregnancies first hand. Marie Stopes International now works in 40 countries around the world.

Our Centres today

Marie Stopes UK operates in over 60 centres and clinics throughout the UK. We've been using our expertise to support women with regards to sexual and reproductive health for over 40 years. But it's not just about expertise. It's about caring and providing women with all the support they might need. 

Find a clinic convenient for you