Condition category
Pregnancy and Childbirth
Date applied
Date assigned
Last edited
Prospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Background and study aims
Nausea and vomiting are common symptoms during early pregnancy, occurring in about 70–85% of pregnancies. Some pregnant women experience excessive nausea and vomiting, known as hyperemesis gravidarum, which leads to dehydration and significant weight loss. Hospitalisation is typically needed to rehydrate patients through a drip and to control nausea and vomiting with medication. In hyperemesis gravidarum, nausea may be triggered by just the thought of food, and vomiting often follows drinking or eating. In women recently hospitalised for hyperemesis it is not known whether there is benefit to a short (12 hour) delay in eating and drinking to allow rehydration and medication to take effect before eating and drinking is restarted. On the other hand, continuing to feed at the same time as rehydration and medication may permit the quickest recovery path. The aim of this study is to find out which is the better approach.

Who can participate?
Pregnant women aged 18 or over with hyperemesis gravidarum

What does the study involve?
Participants are randomly allocated to one of two groups. One group is encouraged eat and drink as soon as possible after hospitalisation. The other group is told to delay eating and drinking (fast) for the first 12 hours after hospitalisation, then resume eating and drinking at their own pace. Both groups receive intravenous rehydration (a drip), thiamine (vitamin) supplementation and anti-emetic (anti- vomiting) medication as standard inpatient treatment for hyperemesis gravidarum. Frequency of vomiting, nausea, patient satisfaction and duration of hospitalisation are measured.

What are the possible benefits and risks of participating?
We do not foresee any major benefits or significant risks. It is not clear which intervention will prove to be superior and there is a distinct likelihood the interventions may produce similar outcomes.

Where is the study run from?
University Malaya Medical Centre (Malaysia)

When is the study starting and how long is it expected to run for?
April 2016 to September 2017

Who is funding the study?
University of Malaya (Malaysia)

Who is the main contact?
Prof. Peng Chiong Tan

Trial website

Contact information



Primary contact

Prof Peng Chiong Tan


Contact details

Department of Obstetrics and Gynaecology
Faculty of Medicine
University of Malaya
Lembah Pantai
Kuala Lumpur
+60 (0)123 052 970

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Delayed compared with early oral intake in the initial manangement of hyperemesis gravidarum: a randomised trial


Study hypothesis

An initial 12-hour period of fasting (delayed oral intake) at hospitalisation for hyperemesis gravidarum to allow for hydration and anti-emetic medication to become effective compared to early feeding will result in less nausea and vomiting and higher patient satisfaction at 24 hours.

Ethics approval

University Malaya Medical Centre Medical Ethics Committee, 04/02/2016, approval no. 1206.12

Study design

Two-arm clinical trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use then contact details below to request a patient information sheet


Hyperemesis gravidarum


Participants are randomized to:
1. Delayed oral intake (fasting) for the first 12 hours after hospitalisation for hyperemesis gravidarum followed by resumption of taking fluids and solids orally at the participants own pace
2. Encouraged to take fluids and solids orally as soon as, as much as and as often as tolerated after hospitalisation for hyperemesis gravidarum

Both arms are to receive intravenous rehydration, oral thiamine supplementation and intravenous anti-emetic as standard inpatient treatment for hyperemesis gravidarum

Intervention type



Drug names

Primary outcome measure

1. Frequency of vomiting in the first 24 hours
2. Nausea score (using a Visual Numerical Rating Scale from 0 to 10) at enrollment, 8, 16 and 24 hours
3. Patient’s satisfaction score (using a Visual Numerical Rating Scale from 0 to 10) at 24 hours

Secondary outcome measures

1. Duration of hospitalisation
2. Ketonuria at 24 hours
3. An 8-item symptoms questionnaire at 24 hours
4. Participant preference on feeding regimen in a future hospitalisation for hyperemesis gravidarum at 24 hours
5. Participant recommendation of their feeding regimen to a friend in the same circumstances at 24 hours

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Clinical diagnosis of hyperemesis gravidarum
2. First hospitalisation for hyperemesis gravidarum in current pregnancy
3. Presence of ketonuria by urine dipstick (of 2+ or greater) at hospitalisation
4. At least 18 years of age
5. Pregnancy gestation of 14 weeks or less

Participant type


Age group




Target number of participants


Total final enrolment


Participant exclusion criteria

1. Multiple pregnancy
2. Molar pregnancy
3. Confirmed non-viable pregnancy
4. Any medical condition that contraindicates oral feeding or fasting

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

University Malaya Medical Centre
Jalan Universiti
Kuala Lumpur

Sponsor information


University of Malaya (Malaysia)

Sponsor details

Lembah Pantai
Kuala Lumpur

Sponsor type




Funder type


Funder name

Universiti Malaya

Alternative name(s)

University of Malaya, UM

Funding Body Type

government organisation

Funding Body Subtype

Local government



Results and Publications

Publication and dissemination plan

We plan to publish the trial results. We are not planning to release raw trial data.

Intention to publish date


Participant level data

Not expected to be available

Basic results (scientific)

Publication list

2020 results in (added 20/05/2020)

Publication citations

Additional files

Editorial Notes

20/05/2020: The following changes have been made: 1. Publication reference added. 2. The final enrolment number has been added from the reference. 18/10/2017: Internal review.