This usually happens due to an increase and high level of progesterone in a pregnant woman's system. (checkpregnancy.com)
The high level of progesterone in your body will make you sleepy, exhausted and dead tired throughout the day. (shrewdmommy.com)
Further, a dose of 20 to 30 mg of progesterone cream used before bed can be helpful to many women who are having trouble getting to sleep and staying asleep. (virginiahopkinshealthwatch.com)