Dietary Supplements vs Fertility Pills

Stephanie
What is the difference between taking a dietary supplement such as Pregprep, Premama, and Pregnitude vs just taking a Prenatal vitamin with Folic Acid and DHA?  We have been trying to conceive quite a while so I want to try something different.
Baby dust to you all and I pray that you're granted God's grace to conceive and NOT miscarry your blessing(s)!  In Jesus name I pray Amen
-James 5:16