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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Reviews: Trust your Body, Trust you…

Complete list of book reviews on the AIMS website Trust your Body, Trust your Baby: How learning to listen changes everything Why Mothers' Medication Matters Trust your B…

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Conference Report: Doula UK 2018 Co…

AIMS Journal, Vol 29, No 4 By Jo Dagustun Wow – what another great conference put on by the team at Doula UK! I was keen to get to this annual conference again, having be…

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Babywearing Twins and Multiples: Ho…

AIMS Journal, 2017, Vol 29 No 4 Nicola Lawson shares her knowledge on carrying one - two - three babies! The idea of transporting two babies at once can be daunting, and…

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Events

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MBRRACE-UK ‘Saving Lives, Improving…

To register your interest please email conference@npeu.ox.ac.uk or keep an eye on our website https://www.npeu.ox.ac.uk/mbrrace-uk/bookings . Earlybird bookings will open…

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Midwifery Today Conference “Birthin…

17–21 October 2018 Further Details

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AIMS AGM

AIMS AGM 2018 All members welcome! Please email secretary@aims.org.uk if you plan to attend to help us to judge numbers, or if you wish to send apologies 10 for 10.30 sta…

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Latest Campaigns

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Press Release: Jeremy Hunt announce…

AIMS is delighted that the Government has recognised the importance to the safety of women and babies of the continuity of carer model of midwifery. Having a midwife that…

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Dr. Ágnes Geréb, Hungarian Midwife…

Dr. Ágnes Geréb is a Hungarian obstetrician and midwife who has been under house arrest following her support for women outside of the obstetric system. March 2018: ENCA…

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"Promoting professionalism, reformi…

AIMS submitted our response to this consultation on the 23 January 2018. A number of regulators, including the Care Quality Commission (CQC), the Professional Standards A…

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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.