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

0345 300 8090

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Why choose Marie Stopes?

Marie Stopes is the UK's leading provider of sexual and reproductive health services. Our vasectomy treatments are available in many centres and clinics throughout the UK.
Our vasectomy treatments are available in many centres and clinics throughout the UK.  Marie Stopes is the UK's leading provider of sexual and reproductive health services. Our specialist staff are on hand 24/7 to offer expert advice and support – from your initial consultation to treatment aftercare. Our approach is to provide men with a fully confidential service delivered by our dedicated and experienced team of nurses and doctors. Clinical care is at the heart of everything we do and we are proud to adhere to the highest standards advised by the Clinical Quality Care Commission.

Our centres provide: 

Confidential, non-judgemental advice, care and treatment

Expertise - over 140,000 operations performed every year

Fast, convenient appointments - depending on treatment it is possible to be in and out of a clinic in an hour

24 hour vasectomy advice and booking service line

24 hour aftercare advice and support from healthcare professionals

Free pre and post treatment counselling if you have booked an appointment with us


Book your consultation

Call us anytime on 0345 300 0212 (24hrs). We can answer all of your questions and arrange a convenient appointment. Whatever your decision, we'll help you every step of the way.