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.



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Am I eligible for a medical abortion (abortion pills)?

At Marie Stopes UK we offer the medical abortion (abortion pills) up to 9 weeks and 3 days of pregnancy.

The medical abortion treatment involves taking two different medicines.

The first tablet is called Mifepristone. It blocks the action of the hormone progesterone, which is needed to maintain the pregnancy. The second tablets are called Misoprostol. These tablets can be given on the same day, or 24, 48 or 72 hours apart. 

Please keep in mind

Not all women are suitable for a medical abortion, although they may still be suitable for a surgical abortion. You may not be eligible for a medical abortion if you have any of the following:

  • A suspected ectopic pregnancy
  • A history of heart disease, high blood pressure, liver or kidney disease
  • Are taking long-term corticosteroids
  • Have an IUD in place which will not be removed prior to treatment
  • Adrenal failure
  • Are taking anti-coagulants or have any hemorrhagic disease of porphyria
  • Have a poorly controlled inflammatory bowel disease
  • Suffer from muscular dystrophies, myasthenia gravis, myotonic dystophy or sickle cell disease

We'll take a full medical history from you and may need you to have some tests done to ensure your safety. If you have serious medical issues, we may suggest it's safest to have your abortion done in a hospital setting. Most women can have their abortions done safely through a Marie Stopes UK clinic. Regardless of your medical history, we suggest you phone us on 0345 300 8090 so we can discuss your options.