Terms of Use and Disclaimer

The information and tools provided on this website are designed to support, not replace, the relationship that exists between a patient/site visitor and his/her physician.


We have taken every care to compile accurate information and to keep it up-to-date, but cannot express a guarantee about its correctness and completeness. Any reliance you place on such information is therefore strictly at your own risk. We cannot accept responsibility for any loss, damage or expense resulting from the use of this information.


Content © Perinatal Institute 2013 - 2024. Perinatal Institute grants permission for the browsing of this material as part of the World Wide Web, and for printing for personal reference only.

Commitment to Information Security

As a not-for-profit, non-NHS organisation, the Perinatal Institute recognises its responsibilities toward Information Governance and Security standards. More information can be found on our Information Governance page.

Virus Protection

We make every effort to check and test material for viruses. However, it is recommended that you run an anti-virus program on all material downloaded from the Internet. We cannot accept any responsibility for any loss, disruption or damage to your data or your computer system which may occur whilst using material derived from this website.

Advertising Policy

This website does not host or receive funding from advertising.


The links are provided for information and convenience only. We cannot accept responsibility for linked sites, or the information found therein.

Use of this Website

The user undertakes: (a) not to use the information for any unlawful purpose; (b) that it shall not make any use of the website such that the whole or part of the website is interrupted, damaged, rendered less efficient, or the effectiveness or functionality of the website is in any way impaired; (c) not to use the website for the transmission or posting of any computer viruses or any material which is defamatory, offensive or of an obscene or menacing character or in such a way as to cause annoyance, inconvenience or needless anxiety; (d) not to use the website in a manner which constitutes a violation or infringement of any person, firm or company (including but not limited to rights of copyright or confidentiality); (e) that it shall not use the website to transmit any material for the purposes of publicity, promotion and/or advertising without the prior written consent of the Institute.

Software and Tools – Disclaimer and Terms of Use

Perinatal Institute and authors of the software cannot accept responsibility for any clinical diagnoses or decisions made on the basis of software programmes or charts provided through this and associated websites. software includes, but is not limited to:

* Online individual centile calculators
* Bulk centile calculators
* Online GROW chart generators
* Fetal growth rate calculators

By using software provided by Gestation Network or Perinatal Institute, whether online or offline, you agree:

1.not to redistribute in any form the software as received by you
2.not to compromise the accuracy of the software by altering its code or appearance in any manner
3.that neither Gestation Network Ltd nor the Perinatal Institute and its employees will be held responsible for clinical diagnoses or decisions made on the bases of software output
4.that you are, in the case of software provided freely, holding a temporary license of use, and that availability can be terminated by us at any time

Cookies and Collection of Information

This site does not use cookies and does not collect any form of data relating to visitors.

Organisational Funding

The Perinatal Institute is a not-for-profit organisation which derives income from providing education, training and software applications to support safe delivery of maternity services.

Technical Information

Some documents on this web site require the Adobe Acrobat Reader. You can obtain a copy from here