Opinions on Evening Primrose Oil and Starflower oil?

Demi β€’ 22 years old. TTC#1!! β€πŸ’™πŸ’šπŸ’›πŸ’œ
So ladies, now AF is here I may as well learn to deal with it. I'm going to be taking Evening Primrose Oil and possibly starflower oil as I noticed I was lacking in cm last cycle. When is it best to take and how much would you say? Want to give myself the best chance!