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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How to book your appointment with Marie Stopes UK

Marie Stopes UK has been providing services for women for Irish women for over 40 years and we always strive to make our booking process as smooth as possible for every woman who travels to the UK to access abortion treatment and care.

CALL MARIE STOPES UK to book your appointment

From Northern Ireland: 0345 300 3737 

From the Republic of Ireland: 1 800 200 374

(Free phone)

For both medical and surgical treatment options [hyperlinks], the process of booking is very similar. You can fill in the online form requesting that we call you back or call us +44 (0) 345 300 8090. Your call will be completely confidential. 

Don’t forget to mention you live in Ireland or Northern Ireland when you call us so we may be able to book your consultation and treatment on the same day.

What happens after I get in touch with Marie Stopes UK?

Once you get in touch with us, we will offer you access to a consultation which can be done over the phone or face to face in a clinic which is most suitable for you. This consultation can happen in our Belfast Clinic if you live in Northern Ireland for example or through one of our partner organisations such as Reproductive Choices in Dublin or with another qualified provider in Ireland [hyperlink to useful contacts page].

You will then usually receive a scan to determine how many weeks you have been pregnant for (gestation). This helps determine which abortion method you may qualify for. You will then be able to decide which option might be best suited to you depending on your gestation, medical history and other factors.


If English is not your first language, please have someone call us on your behalf. 

What is a consultation and why do it need it?

A consultation is a brief medical assessment, which purpose is to assess: 

  • If you are pregnant 
  • Your gestation - how many weeks you have been pregnant for in order to assess which abortion methods might be available to you
  • If you have considered all your options in relation to your pregnancy
  • If you would like to speak to one of our counsellors at any point 
  • Find a clinic where you might receive your treatment
  • As an Irish women, you will also be asked to confirm that you are coming to Marie Stopes UK privately and will pay for your treatment

Keeping your details secure

We will then take a few personal details to book your appointment. These details captured will be 100% confidential. To protect your information and keep your details confidential and secure, we will set up a PIN and password for you which you will need to keep safe. We will then be able to confirm your appointment details - date, time and address of the clinic or centre - if you have decided to proceed. We will ask you if you would like a confirmation to be sent to you by text, letter or email. 

Need to talk about your options?

Our 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 3737 (callers from Northern Ireland) or 1 800 200 374 (Free phone for callers from the Republic of Ireland) or email services@mariestopes.org.uk.