[What is mild stimulation?].

Mild stimulation is the administration of low doses (150 IU/day) of FSH, continuously, from the fifth day of the cycle, associated with the administration of GnRH antagonists. Despite the lower number of oocytes collected during mild stimulation, they are better for pregnancy rates on with an endometrium nearest closer to the natural cycle, and reducing the risk of ovarian hyperstimulation. Although the number of IVF ± ICSI attempts is limited to 4 in France, the Mild stimulation may be proposed in young women, those with a polycystic ovary syndrome or "low responder" women.