Women Supporting Women
• Campaigning for better births for all
• Protecting human rights in childbirth
• Independent information about pregnancy and birth
• Raising awareness of research

For a better birth

Latest Content

Journal

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Resolution – Moving forward from a…

To read or download this Journal in a magazine format on ISSUU, please click here AIMS Journal, 2019, Vol 31, No 3 By Emma Ashworth For years, AIMS produced a small book…

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The AIMS Guide to Resolution: A new…

To read or download this Journal in a magazine format on ISSUU, please click here AIMS Journal, 2019, Vol 31, No 3 By Shane Ridley I’m very pleased to introduce a book, T…

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Failures in Maternity System Regula…

To read or download this Journal in a magazine format on ISSUU, please click here AIMS Journal, 2019, Vol 31, No 3 By Beth Whitehead After a difficult birth, it is natura…

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Events

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Midlands Maternity & Midwifery Fest…

The festival runs from 8am to 5pm on 23rd April 2020 and includes expert speakers, an exhibition, seminars and an awards ceremony. Speakers include: Mary Renfrew FRSE (Pr…

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Perinatal Mental Health Maternity S…

8.30am - 5pm Study day, including networking breaks and lunch, with sessions on the following topics: Bipolar support in pregnancy and planning for the postnatal period M…

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AIMS Volunteers Meeting

Details TBC

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Latest Campaigns

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AIMS Response to NMC Consultation o…

The Nursing and Midwifery Council (NMC) plays a key role in the ongoing quality assurance and regulation of the maternity services and its staff. Effective and efficient…

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AIMS Submission to the UN Special R…

Call for submissions: Mistreatment and violence against women during reproductive health care with a focus on childbirth The mandate of the United Nations Special Rapport…

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The Future Midwife Project: An AIMS…

AIMS submitted our response to this consultation on 7 May 2019. The Nursing and Midwifery Council (NMC) plays a key role in the ongoing quality assurance and regulation o…

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Pregnancy Calculator i

When's your due date?

What does your "due date" mean? How long is a normal pregnancy? How might being given a due date affect you and your baby? Enter the first day of your last period to discover when you're most likely to give birth.... and to find out more about due dates, induction and "post date" babies.
You are weeks pregnant.
Date of the first day of your last period
Adjusted cycle length

Date of the first day of your last period

The date of your last period allows an estimation of when you ovulated and conceived your baby.

A surprising number of women will have a bleed after they are pregnant, and although seeking advice from a doctor or midwife is recommended, usually this bleeding is not a problem.

Adjusted cycle length

Your menstrual cycle is counted from the first day of one period to the first day of the next. The average menstrual cycle is 28 days long, but many women will have longer or shorter cycles than this.

Ovulation usually takes place about 14 days before the next period. This means in a short cycle ovulation will be less than 14 days after your last period and with a long cycle more than 14 days after your last period. Giving the length of the cycle allows this to be taken into account in calculating your due date.

Many women have irregular cycles which make using the last day of their period less reliable for estimating due date.