Related Experiment Video
Updated: Sep 26, 2026

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World
Published on: April 7, 2020
The sleep patterns of young twins
Leslie Bartlet1, Chatree Witoonchart
1Southampton City Primary Care Trust.
Insights
Twin and singleton children aged 12-36 months show similar sleep patterns. Parental nighttime burden was slightly higher for twins, suggesting further research into IVF twin sleep differences.
Area of Science:
- Pediatric sleep science
- Twin studies
- Child development
Background:
- Sleep disorders are common in young children under three.
- Limited research exists on the sleep patterns of twin infants and toddlers.
- Parental sleep disruption is a significant concern for families with young children.
Purpose of the Study:
- To investigate and compare the sleep patterns of twins and singleton children aged 12-36 months.
- To assess the parental nighttime burden associated with caring for twins compared to singletons.
- To explore potential differences in sleep based on twin type (natural conception vs. IVF).
Main Methods:
- A comparative study design was employed.
- Sleep patterns of 48 twin pairs (96 children) aged 12-36 months were analyzed.
- A control group of singleton children within the same age range was included for comparison.
Main Results:
- The sleep patterns of young twins were found to be broadly similar to those of singleton children.
- Parents of twins reported a slightly, but not markedly, heavier nighttime burden compared to parents of singletons.
- No significant differences were noted between twins conceived naturally and those conceived via In Vitro Fertilization (IVF) in this study.
Conclusions:
- Young twins exhibit sleep patterns comparable to their singleton peers.
- While parental nighttime burden is slightly increased for twins, it is not substantially different.
- Further investigation into the sleep characteristics of IVF twins is warranted.
Abstract:
Young children under three years are particularly prone to sleep disorders but the sleep patterns of twins have received little attention. This study considered the sleep patterns of 48 pairs of twins (96 children) aged 12-36 months compared with a control group of singleton children. The sleep patterns of twins were broadly similar to those of singletons. As other reports have indicated, the burdens carried by the parents of twins at night were heavier but not markedly so. Possible differences between normal and IVF twins in respect of sleep merit further consideration.
Related Concept Videos
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Ovarian Cycle
Stages of Sleep
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Insufficient Sleep and Sleep Deprivation
Sleep deprivation is a more severe form of sleep loss...
Blind Procedures
Circadian Rhythms and Gene Regulation

