Dr Yvonne Bohn tells Romper that sleep deprivation and fatigue can lead to forgetfulness and cognition issues, possibly leading to “pregnancy brain.”

Pregnancy brain can occur as early as the first trimester since that’s when your hormone changes are the most dramatic, Bohn says. Usually the hormone changes plateau during the second trimester, but as delivery approaches, you may be experiencing insomnia again because of the ever-so-lovely pregnancy symptoms of having to pee a million times throughout the night, being uncomfortable from your bump, having heartburn, or having leg cramps.