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

You are here

How do I book a Marie Stopes appointment?

Whether you're having NHS or private treatment, Marie Stopes UK is here for you 24/7. We can arrange a flexible appointment for you with minimum waiting time.

Call us 24 hours, 365 days a year

Abortion Care Advice Line

0345 300 8090  

Female Sterilisation / Vasectomy Advice Line

0345 300 0212


Health Checks

0345 300 0460


We can answer any questions you have about:

  • treatment
  • appointments
  • whether you're eligible for NHS-funded treatment
  • whether you can self-refer for treatment
  • if you would like to pay privately for your treatment

Call Monitoring and Recording

Please note that calls are recorded for quality and training purposes. 

Request a call back

Complete our booking form and we'll get back to you as soon as we can. Your enquiry will be confidential – your details are stored securely and will not be shared with any external parties. 

Request a call back/fill out a booking form.

Email us

If you'd prefer, you can also email us at services@mariestopes.org.uk.