Ovarian Follicle
anatomyDefinition
A fluid-filled sac in the ovary that contains a developing egg. Each follicle contains one oocyte.
In IVF Treatment
Follicle growth is monitored closely during stimulation. A follicle is considered mature when it reaches approximately 18-20 mm. The trigger shot is given when multiple follicles reach this size to complete maturation before retrieval.
Frequently Asked Questions
How many follicles do I need for IVF?
More follicles generally mean more eggs, but quality matters most. Most clinics aim for 8-15 mature follicles. Having 20+ follicles can increase OHSS risk, while fewer follicles means fewer eggs to work with.