How to regulate your child’s sleep hormones
Following the specified course(s)...
There was an error while trying to follow the specified course(s).
Check that you are not currently following them or please try again later.

Thank you
30 of 39
my list
Cancel x

Enter your email:

Enter the email addresses you want to share this with:

Thank you!
Page was successfully shared!
You have finished viewing your e-Prescription!
Take a Course
Mandy Gurney
Former Director of the Sleep Clinic at the NHS St Charles hospital in London and Director of Millpond Sleep clinic. She also works as an NHS Sleep educator to health professionals across the UK.
{{ ellipsisText }}

Stage 4 – 9 months

Should I leave my baby/ toddler to cry at night?

When coping with a new baby, there's no doubt that one of the most difficult aspects is the stress and tiredness brought about by sleep deprivation.
Video Tutorial
In Short
There are several reasons why it is not recommended to leave babies to cry on their own, as researchers have found that when babies are left to cry on their own, even when they have stopped crying and settled, were often still actually as stressed (with raised cortisol levels) as they would have been if they’d continued crying.

There are several reasons why the Essential Parent sleep parent does not recommend leaving small babies to cry on their own. These include:…

Sleep deprivation

When coping with a new baby, there’s no doubt that one of the most difficult aspects is the stress and tiredness brought about by sleep deprivation.

It’s normal for babies to wake in the night (as it is with puppies and all baby mammals) and parents need to work around that and it can be unhelpful when ‘gurus’ convince new parents that very little babies can and should sleep through the night from an early age.

Evolution has developed a system where babies wake regularly through the night to ensure their needs are being met. It’s not always easy for the parents but it helps ensure baby’s survival.

A baby who is waking several times in the night will naturally wake their parents, and this will have an ongoing negative effect throughout the next day. There’s no doubt that bringing a new life into the world is one of the most exciting and joyous things you can do, but it also has to be accepted that dealing with a newborn baby whilst in a constant state of exhaustion is a daunting proposition.

Finding a sleep routine

Many parents find themselves feeling guilty that they’re not ‘enjoying’ their baby as much as they should and this guilt, in turn, merely serves to create more stress and anxiety.

There are almost as many plans, methods and approaches to settling a baby’s sleep routine as there are babies themselves, and finding the one which matches your own parental attitude is often a matter of trial and error. Friends, your own parents and other relatives will be only too keen to throw in their own advice and experience and the plethora of conflicting opinion can often be very confusing. That’s why the presence of any official research into the subject can be seen to be incredibly useful.

Using the research to make your decision

This is an area into which personal prejudice and firmly held opinion often intrude, with some people recommending a certain approach, whilst others insist that this self-same approach would be disastrous. Faced with this, it’s handy to be able to consult carefully conducted research which is based on facts, not opinion, and which can easily be taken at face value. Such research into the method known as ‘controlled crying’ has recently been published. It throws an interesting and informative light upon this approach to the task of settling a child into regular sleep patterns.

What is controlled crying?

In its most basic terms, controlled crying consists of leaving a baby to cry for increasing periods of time and providing minimal comfort at regular intervals until the baby ‘settles’ to sleep by themselves.

Over time, such babies are said to eventually settle themselves to sleep without being comforted and, over a longer period of time, they seem to establish a set sleeping pattern. Wendy Middlemiss, of the University of North Texas, has recently undertaken research on the effects of this approach on both the children and their mothers.

Research into stress during controlled crying

The research was based on babies aged from four to ten months and consisted of researchers measuring the presence in the babies’ system of the hormone cortisol. Cortisol is generally referred to as the ‘stress hormone’ since its presence in the body, at an elevated level, indicates that the person in question is experiencing heightened levels of anxiety. The hormone is released into the bloodstream in order to boost the so-called ‘fight or flight’ response and has effects such as a quick burst of energy and a lower sensitivity to pain.

During the research, the babies’ cortisol levels were measured as they cried themselves to sleep without being comforted. Researchers found that, on many occasions, babies who had stopped crying and settled were still actually as stressed as they would be if they’d continued crying. Prolonged raise levels of cortisol in a baby are said to inhibit his ongoing brain development and may results in your baby growing into an anxious, less confident child.

Studying the length of time taken to fall asleep

Another part of the research consisted of monitoring the length of time it took the children to fall asleep on consecutive nights, and here it was found that, by the third night of the study, the babies were crying for a shorter length of time before settling. Despite this, however, the levels of cortisol in their saliva remained high. At the same time, the cortisol levels of the mothers waiting nearby were tested, and it was noted that this fell in line with the length of time the babies spent crying, meaning that the mothers relaxed as soon as they felt their offspring were settling to sleep.

According to the researchers “on the third day of the program, results showed that infants’ physiological and behavioural responses were dissociated. They no longer expressed behavioural distress during the sleep transition but their cortisol levels were elevated.” Wendy Middlemiss, in charge of the research, stated that although the infants exhibited no behavioural cue that they were experiencing distress at the transition to sleep, they continued to experience high levels of physiological distress, as reflected in their cortisol scores. Overall, outward displays of internal stress were extinguished by sleep training. However, given the continued presence of distress, infants were not learning how to internally manage their experiences of stress and discomfort.

What does this mean for parents?

Research is now being done in the way that the cortisol levels are affected over a longer period of time, as infants sleep patterns become more settled. Whilst no single piece of research can ever totally decide a discussion such as this, the information could be borne in mind by parents considering using the controlled crying approach when attempting to establish a settled sleep routine.

If you are really struggling with your baby’s sleep patterns, there are options other than controlled crying that might help you to get more sleep. You can talk to your Health Visitor for other ideas or if you feel you need more support to cope with life with your new baby.
Share the knowledge
This article is for information only and should not be used for the diagnosis or treatment of medical conditions. Essential Parent has used all reasonable care in compiling the information from leading experts and institutions but makes no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details click here.