Lots of moms will experience more severe morning sickness and fatigue because of the increase in hormones due to carrying two babies. (twin-pregnancy-and-beyond.com)
If you are having twins, you are most likely to experience severe morning sickness compared to someone who is carrying a single child. (themamaneeds.com)
Women who are pregnant with multiples may have more severe morning sickness or breast tenderness than women who are pregnant with a single baby. (acog.org)