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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What we’ve been up to this quarter!

AIMS Journal, 2021, Vol 33, No 2 To read or download this Journal in a magazine format on ISSUU, please click here By the AIMS Campaigns Team The Campaigns Steering Group…

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Review of the Spanish documentary B…

AIMS Journal, 2021, Vol 33, No 2 To read or download this Journal in a magazine format on ISSUU, please click here Birth in the 21 st Century is a Spanish documentary pro…

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Understanding Intrahepatic Cholesta…

AIMS Journal, 2021, Vol 33, No 2 To read or download this Journal in a magazine format on ISSUU, please click here By Jenny Chambers In this article, Jenny introduces us…

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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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AIMS Annual General Meeting 2020

This year’s AGM will be an online meeting, so we plan to keep it to two hours. However, there will be the opportunity to stay, chat and socialise with friends and colleag…

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Latest Campaigns

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NICE Inducing Labour Guideline - Co…

AIMS has prepared comments on the draft NICE Guideline for Inducing Labour You can read our comments here The details of the consultation on the draft guidelines can be f…

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Submission to the Health and Social…

As part of its non-inquiry work, the Health and Social Care Select Committee have established a panel to conduct an evaluation of the Government's commitments in the area…

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Report on the But Not Maternity/Nat…

AIMS and our partners in the But Not Maternity Alliance and National Maternity Voices organised a webinar for MVP/MSLC representatives. The purpose was to raise awareness…

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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.