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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Abortion Criteria in Northern Ireland

Abortion is legal in Northern Ireland but only under strict circumstances. The majority of women would still have to travel to England to have access to abortion treatment.

The UK Government have committed to cover the cost of abortion care for women travelling to England from Northern Ireland. Find out more here.

What are the criteria to receive a medical abortion in Northern Ireland?

The criteria to have access to a medical abortion (abortion tablets) in Northern Ireland under the Law are as follows:

To preserve the life of the mother.

If the continuance of the pregnancy threatens the life of the mother, or would adversely affect her mental or physical health. In most cases, the risk of the adverse effect occurring would need to be a probability, but a possibility might be regarded as sufficient if the imminent death of the mother was the potential adverse effect.

If continuing with the pregnancy would have other serious permanent physical or mental health effects. The adverse effect on her mental or physical health must be a “real and serious” one, and must also be “permanent or long-term”. It will always be a question of fact and degree whether the perceived effect of a non-termination is sufficiently grave to warrant terminating the pregnancy in a particular case.  To receive medical abortion treatment, the pregnancy must be under 9 weeks 4 days gestation. If you have been pregnant for over 9 weeks, you will need to travel to England for surgical treatment. 

Can I receive a medical abortion at Marie Stopes UK in Belfast?

If you believe that you might be entitled to medical abortion in Northern Ireland as described above, Marie Stopes UK can offer you a medical assessment over the phone or by appointment in our clinic in Belfast. If you believe that you do meet the criteria due to a psychiatric or medical condition, it is crucial that you have evidence of your condition at hand so you can make reference to this during your assessment call with Marie Stopes UK.

Medical Assessment in Belfast with Marie Stopes UK

If you have a face-to-face appointment at Marie Stopes UK Belfast, please bring any relevant medical information (written evidence) with you. All abortion treatment in Northern Ireland depends on your medical assessment under Northern Irish Law.

After your medical assessment over the phone or face-to-face

Once completed, you will be informed about the treatment  you can have in Northern Ireland or if you need to travel to England to receive treatment. Please note that we will need to complete a written consent before treatment if you were to receive treatment with Marie Stopes UK in Northern Ireland or in England.

What if I don’t qualify to receive medical abortion treatment in Northern Ireland?

Women who do not qualify for treatment under Northern Ireland Laws as listed above, can call Marie Stopes UK on 00 44 345 300 3737 to make an appointment in the UK.