The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist. Key fact One way to remember which muscle is the agonist – it's the ...

The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist. Key fact One way to remember which muscle is the agonist – it's the ...

In the majority of IVF cycles, whether using an agonist or an antagonist protocol, the trigger used is human chorionic gonadotropin (hCG), which shares a common subunit with LH and thus acts as a ...