During which stage of pregnancy is insomnia most common?

Insomnia is most prevalent during the third trimester of pregnancy due to a combination of physical and psychological factors. As the pregnancy progresses, many women experience discomfort from the growing uterus, which can put pressure on the bladder, leading to increased nighttime urination. Additionally, back pain, heartburn, and leg cramps are common complaints that can disrupt sleep during this stage.

Hormonal changes, including fluctuations in progesterone and estrogen, also contribute to sleep disturbances. Furthermore, anxiety and anticipation regarding labor and the impending arrival of the baby can lead to racing thoughts or worries that make it difficult for expectant mothers to relax and fall asleep.

In contrast, while insomnia can occur during the first and second trimesters, it is typically less severe during these periods. The postpartum period can also present challenges for sleep due to the demands of caring for a newborn, but that is a separate phase of the maternal experience. Therefore, the third trimester stands out as the stage where insomnia is most commonly reported.