By puberty, the ovary contains around 300-400.000 follicles, that only 400 of these will ever reach the mature (preovulatory) stage during the female reproductive age (the rest undergo a process of follicular death, known as atresia, and they are called “atretic”).
There are three basic categories of stimulation protocols, designed to be used in IVF that can be modified according to each case. However, every patient reacts to the hormones differently.
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