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

Resources and referral forms for healthcare professionals

If you'd like to order a supply of Marie Stopes United Kingdom leaflets, posters or information for your surgery, clinic or organisation, please email us at marketing@mariestopes.org.uk.

We'll send you our general information pack for health professionals within 10-14 working days. If you have specific areas of interest (eg. sexual health/female sterilisation/vasectomy) please let us know.

Find our termination of pregnancy referral form, male and female sterlisation referral form and HSA1 form in various formats below. 


Termination of pregnancy referral form

Termination of pregnancy referral form PDF                                  HSA1 form         

Formats available:  PDF   EMIS  VISION

Vasectomy Referral form


Formats available:  PDF   EMIS  VISION