Table 3.9Duration of the latent first stage in nulliparous and parous women

NULLIPAROUS WOMEN
StudyNMedian cervical dilatation on admission (cm)Definition of reference pointsMedian duration (h)5th percentile (h)95th percentile (h)
Peisner 1985 (56)15440.5Reported onset of contractions until slope of labour record > 1.2 cm/h7.5NRNR
Ijaiya 2009 (57)755.0Duration of labour before presentation6.0NRNR
Median cervical dilatation on admission (cm)Definition of reference pointsMean duration (h)SD (h)+2SD (h)
Juntunen 1994 (58)42NRNot defined5.13.211.5
Velasco 1985 (59)74NRFrom admission until 4 cm7.11.610.3
PAROUS WOMEN
StudyNMedian cervical dilatation on admission (cm)Definition of reference pointsMedian duration (h)5th percentile (h)95th percentile (h)
Peisner 1985 (P = 1) (56)7204.5Reported onset of contractions until slope of labour record > 1.5 cm/h5.5NRNR
Peisner 1985 (P > 1) (56)5814.5Reported onset of contractions until slope of labour record > 1.5 cm/h4.5NRNR
Ijaiya 2009 (57)1636.0Duration of labour before presentation5.0NRNR
StudyNMedian cervical dilatation on admission (cm)Definition of reference pointsMean duration (h)SD (h)+2SD (h)
Juntunen 1994 (P = 2/3) (58)42NRNot defined3.22.37.8a
Juntunen 1994 (GM) (58)42NRNot defined2.21.65.4a
Velasco 1985 (59)37NRFrom admission until 4 cm5.71.58.7a

GM: grand multiparity; h: hour; NR: not reported; P: parity; SD: standard deviation; a Value estimated by systematic review authors.

Source: Abalos et al., 2018 (52).

From: 3., Evidence and recommendations

Cover of WHO recommendations: Intrapartum care for a positive childbirth experience
WHO recommendations: Intrapartum care for a positive childbirth experience.
Copyright © World Health Organization 2018.

Sales, rights and licensing. To purchase WHO publications, see http://apps.who.int/bookorders. To submit requests for commercial use and queries on rights and licensing, see http://www.who.int/about/licensing.

Third-party materials. If you wish to reuse material from this work that is attributed to a third party, such as tables, figures or images, it is your responsibility to determine whether permission is needed for that reuse and to obtain permission from the copyright holder. The risk of claims resulting from infringement of any third-party-owned component in the work rests solely with the user.

Some rights reserved. This work is available under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 IGO licence (CC BY-NC-SA 3.0 IGO; https://creativecommons.org/licenses/by-nc-sa/3.0/igo).

Under the terms of this licence, you may copy, redistribute and adapt the work for non-commercial purposes, provided the work is appropriately cited, as indicated below. In any use of this work, there should be no suggestion that WHO endorses any specific organization, products or services. The use of the WHO logo is not permitted. If you adapt the work, then you must license your work under the same or equivalent Creative Commons licence. If you create a translation of this work, you should add the following disclaimer along with the suggested citation: “This translation was not created by the World Health Organization (WHO). WHO is not responsible for the content or accuracy of this translation. The original English edition shall be the binding and authentic edition”.

Any mediation relating to disputes arising under the licence shall be conducted in accordance with the mediation rules of the World Intellectual Property Organization.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.