Agonist vs Antagonist

Tenelle • Aussie 🇦🇺 TTC 4 Years. Failed FET Feb 2019. 2nd FET 22nd March 2019 SUCCESS! B/G Twins Due Nov 2019 👶🏼 👶🏼

Can anyone tell me what the difference is between Agonist Cycle and Antagonist Cycle please? Which worked for you, which do you prefer? Most common? Etc. whatever info you can give me please!