Sleep disturbances, which are common and prevalent in pregnancy, increase as pregnancy progresses. Poor health outcomes resultinging from biological, and secretion modifications throughout pregnancy might be associated with sleep disturbances. The association of sleep abnormality and pregnancy complications is biologically plausible. Depending on the women’s body position and increase in their abdomen size, women can experience insomnia during pregnancy. Around 2/3 of pregnant women consider their sleep pattern has become abnormal. It brings tremendous changes in women’s physiological, psychological and social life. Pregnancy is one of the most crucial and critical stages in a woman’s life. Insomnia is typically diagnosed by recording nightly bedtime routine. Pathophysiology and the time insomnia starts is not always clear.
A considerable quantity of studies reported that women complained more often of insomnia than men. Insomnia is the most common sleep complaint affecting 10–13% population chronically, and up to 35% of the population is experiencing some symptoms of insomnia.
Insomnia is a patient-reported compliant defined as difficulty in falling asleep or maintaining sleep, i.e., frequent awakening, difficulty returning to sleep after awakening, or awakening too early with inability to return to sleep. They are generally classified as disturbed quality, poor sleep continuity, Restless Legs Syndrome, sleep disorder and sleep respiratory disorder. Sleep disorders are considered to be the foremost important issues in medical care. Sleep is an essential physiological need for human beings, and it is also critical for their physical and physiological health. It is thus recommended that in addition to having regular visits during pregnancy, pregnant women should also be continuously monitored for sleep-related disorders. As a result, maintaining the physical and mental health of pregnant mothers is very important. While sleep disturbances can cause mental and physical problems in pregnant women, they can consequently cause problems for the fetus. Sleep disorders are neglected among pregnant women, and they are considered natural. Insomnia was highly prevalent in the last trimester of pregnancy. Both of these differences were statistically significant ( P < 0.05). Conversely, as the year of research increases, the prevalence of insomnia in the third trimester of pregnancy decreases. It was reported that as the sample size increases, the prevalence of insomnia in the third trimester of pregnancy increases. In 10 articles and 8798 participants aged between11–40, the overall prevalence of insomnia in the third trimester of pregnancy based on meta-analysis was 42.4% (95% CI: 32.9–52.5%). Also, the possible effects of heterogeneity in the studied studies are investigated using meta-regression analysis. The heterogeneity of studies was investigated using the I 2 index. Articles developed based on cross-sectional studies were included in the study. The literature used in this meta-analysis for the topic discussed above were obtained through searching several databases, including SID, MagIran, IranDoc, Scopus, Embase, Web of Science (WoS), PubMed Science Direct and Google Scholar databases without time limitation until December 2020. This study aims to systematically review the overall prevalence of insomnia in the third trimester of pregnancy through conducting a meta-analysis. The present study is a meta-analysis of the prevalence of insomnia in the third trimester of pregnancy. Sleep disorders, which are among the foremost important medical care issues, are prevalent in pregnancy.