Weighted Blanket in Pregnancy

Ataturk University

Status: Not yet enrolling

Conditions: Poor Sleep Quality; Anxiety; Stress; Pregnancy; Leg Cramps, Nocturnal

Treatments: Device: Weighted Blanket

Study type: Interventional

Funder types: Other

Identifiers

NCT07309016

B.30.2.ATA.0.01.00/t

Details and patient eligibility

About

Pregnancy is frequently accompanied by sleep disturbances, musculoskeletal discomfort, anxiety, and stress, which may negatively affect maternal well-being and daily functioning. Weighted blankets, which provide deep pressure stimulation, have been used as a non-pharmacological method to promote relaxation, improve sleep quality, and reduce stress and anxiety. However, their effects have not been evaluated in pregnant women. This study aims to examine the effect of weighted blanket use on lower leg cramps, sleep quality, anxiety, and stress levels among pregnant women. The trial uses a randomized, self-controlled design in which each participant completes a 14-day control period without the blanket and a subsequent 14-day intervention period using the weighted blanket. Data will be collected using validated measurement tools. The findings are expected to provide evidence for a safe, non-pharmacological supportive approach that may enhance comfort and psychological well-being during pregnancy.

Full description

Pregnancy involves physiological and psychological changes that may contribute to sleep difficulties, lower extremity cramping, and increased levels of anxiety and stress. Because pharmacological approaches are often limited during pregnancy, non-pharmacological strategies are important for promoting maternal comfort and well-being. Weighted blankets provide evenly distributed pressure across the body, generating deep pressure stimulation that may induce relaxation, reduce arousal, and support more stable sleep patterns.

This study is designed as a randomized, self-controlled trial to evaluate the effects of weighted blanket use on sleep quality, lower leg cramps, anxiety, and stress in pregnant women. The study includes one group of participants who undergo two consecutive phases:

Control Phase (14 days): Participants complete daily sleep diaries and standardized assessments without using a weighted blanket.

Intervention Phase (14 days): Participants receive an 8-kg glass-bead weighted blanket and use it during the sleep initiation period (approximately 40 minutes each night). Daily sleep diaries and standardized assessments are repeated following the intervention.

To support participant safety, the blanket weight will not exceed 8-10% of body weight, and participants will be instructed to use the blanket only during sleep onset. Participants will receive guidance on maintaining a safe sleep posture, particularly the left lateral position. Weekly follow-up phone calls will be conducted to monitor adherence, comfort, and potential adverse effects.

Hygiene measures include individual duvet covers for each participant, laundering of blankets between uses, and supervised storage of materials. All assessments will be administered by trained research personnel in accordance with standardized procedures.

Statistical analysis will include descriptive statistics, normality assessment, repeated-measures tests, and effect size calculations appropriate for within-subject comparisons. The study aims to determine whether weighted blanket use produces measurable improvements in sleep parameters, musculoskeletal discomfort, and psychological well-being during pregnancy. The results may contribute to evidence-based, complementary care practices in midwifery and prenatal health.

Enrollment: 50 estimated patients

Sex: Female

Ages: 18 to 40 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Primarily pregnant women between the ages of 18 and 40 ,
• Low BMI (to be able to use 8kg weighted blanket),
• Gestational week ≥ 28,
• Third trimester pregnant women,
• Singleton pregnancy,
• Ability to communicate verbally and in writing in Turkish,
• Willingness to participate in research and comply with intervention protocols..

Exclusion criteria

• Those who have been diagnosed with high-risk pregnancy,
• Preeclampsia or eclampsia, placenta previa,
• Gestational diabetes requiring insulin,
• Diagnosis of fetal growth retardation,
• Polyhydramnios or oligohydramnios, asthma , sleep apnea or serious heart/circulatory problems,
• History of bleeding during pregnancy,
• Obstetric complications requiring close medical monitoring.
• Multiple pregnancies,
• Previously diagnosed with a sleep disorder,
• Having been diagnosed with a psychiatric disorder
• Multiparous pregnant women,
• Pregnant women in the first two trimesters ,
• Night shift workers

Trial design

Primary purpose: Supportive Care

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

---

50 participants in 1 patient group

This is a self-controlled randomized study.

Other group

Description:

This study is designed to evaluate the effect of weighted blankets on lower leg cramps, sleep quality, anxiety and stress in pregnant women, assessing both the control group and the intervention group. This study is planned as a randomised self-controlled trial. This method was specifically chosen for the study design. The single-group approach allows for comparisons within each individual, significantly reducing the impact of personal differences. This minimises any bias that may arise from inter-individual variability. Furthermore, as multidimensional variables such as the lifestyle habits of pregnant women, their level of physical activity, dietary patterns, and environmental factors affecting sleep patterns have the potential to obscure the results of the study, this method aims to minimise the impact of these factors.

Treatment:

Device: Weighted Blanket