Pregnancy dreams can occur at any time during pregnancy, but they are often more noticeable during the second and third trimesters.
While some women experience vivid or unusual dreams early in their pregnancy, the increased frequency and intensity of these dreams are commonly reported as pregnancy progresses. This is largely attributed to the significant hormonal changes and physical discomforts that become more prominent in later stages of pregnancy.
Therefore, while pregnancy dreams can start early, they often become more prevalent and memorable later on.