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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AIMS during the 1970s

AIMS Journal, 2020, Vol 32, No 3 By Shane Ridley AIMS Trustee I decided to read through the 1970s , starting with the Quarterly Newsletter for September 1970 which was ty…

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AIMS during the 1960s

AIMS Journal, 2020, Vol 32, No 3 by Dorothy Brassington AIMS Trustee and Treasurer It has been fascinating to read the early newsletters and discover exactly what AIMS wa…

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AIMS during the 1980s

AIMS Journal, 2020, Vol 32, No 3 by Verina Henchy AIMS Trustee I was delighted to hear that the theme for this Journal is to look back over a 60 year history of maternity…

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Events

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AIMS 60th Anniversary Event - Confe…

POSTPONED FROM JUNE 2020 Making a difference past and future The purpose of the day is to celebrate what Birth Activists in general and AIMS in particular have achieved,…

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Presenting the MBRRACE-UK 'Saving L…

Friday 11th December 2020 At this virtual conference we will present the findings of the 7th MBRRACE-UK report of Saving Lives, Improving Mothers' Care: findings of the s…

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Presenting the MBRRACE UK Perinatal…

Thursday 10th December 2020 At this virtual conference we will present the findings of the: National Perinatal Mortality Surveillance for Births in 2018 National Confiden…

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Latest Campaigns

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Call to NHS England to strengthen g…

AIMS, as part of a coalition of campaigning organisations including Birthrights, the BirthBliss Academy, the Fatherhood Institute, Make Birth Better and Pregnant then Scr…

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Press Release: Almost Half of NHS T…

AIMS welcomes the BMJ article www.bmj.com/content/371/bmj.m3876.full highlighting recent research on inconsistencies in Trusts’ restrictions on partner attendance in mate…

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AIMS comments on latest guidance on…

AIMS welcomes the new ' Framework to assist NHS trusts to reintroduce access for partners, visitors and other supporters of pregnant women in English maternity services '…

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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.