There are so many amazing facts about your newborn, including the range of newborn reflexes that they're born with. These reflexes cause involuntary movements or actions and are just one of the many survival mechanisms your baby is born with. One reflex you may have heard of is the Moro reflex, or startle reflex as it's sometimes called.
What is the Moro reflex?
The Moro reflex or startle reflex is your baby's natural response to anything startling such as a loud noise or feeling of falling. You might notice baby's back arches, they may fling their arms about, bring their knees in and clench their fists. They may also let out a cry, but don't worry, it should be over within a few seconds.
Although it might appear a little concerning, the Moro reflex is nothing to worry about. In fact, it's a sign your baby's neurological development is healthy and their natural reflexes are there to protect them. That's whya paediatrician will check for the Moro reflex when your baby is born to check the nervous system is working.
The only down side is that their reflex could wake your baby up in their sleep, which is slightly annoying when you're a sleep deprived parent. Many babies however fall back to sleep quickly after the reflex.
What causes the Moro reflex?
Unlike other reflexes that are part of normal activity and spontaneous in nature, the Moro reflex is triggered by a loud noise or movement. That's why it's sometimes called the startle reflex. Triggers can include:
Very bright lights - this might happen if you switch a bright light on suddenly in a dark room.
Loud, sudden noises - think loud dog barks, sirens or if you drop something causing a loud smash or bang.
The sensation of falling - this can happen if you put your baby down quickly and they don't feel they have enough support.
An unexpected movement - this may be caused by lifting them out their car when asleep or even sudden movements during car journeys.
How long does the Moro reflex last?
The Moro reflex while it's happening should only last a few seconds. Your baby should also grow out of their Moro reflexes after a few months and by six months, they should have grown out of it.
If the reflex doesn't seem to be going away by the six month mark, then it's a good idea to speak to your paediatrician.
When is it a cause for concern?
Your baby's reflexes will be regularly tested by your doctor, but if you notice their reflexes suddenly stop or change, it's worth flagging with your doctor.
You can also speak with your doctor if you find the Moro reflex is becoming a problem, for example if they're consistently waking themselves up. There are also a number of things you can try to help the reflex.
Keep your baby supported - when holding your baby or carrying them around, make sure they feel extra safe and secure in your arms, keeping their head and neck well supported.
Have a go at swaddling - learning how to swaddle your baby may also help them feel safe and secure and it can also prevent them from waking themselves up with sudden arm movements.
Noise control - while we can't be absolutely silent while baby is napping, there are things you can do to minimise sound. If you're in a noisy house or room, try a white noise machine to cancel out any other noises.