Timing of the trigger shot during IVF
This needs to coincide with the maximum of the ovarian follicles being more than 15 mm in diameter. It may happen so with numerous follicles having reached 18 to 22 mm as well. The follicles develop an average of two mm in a day with optimum stimulation. Follicles larger than 22 mm will typically harbor overdeveloped eggs, which may possibly fail to fertilize. Follicles less than 15 mm contain underdeveloped eggs which may be more likely to be incompetent following the trigger.
Does trigger shot release all mature eggs?
The protocol decided on for ovarian stimulation is one of the most critical elements of IVF treatment due to the fact that most beneficial egg maturation depends on earlier egg development. Unless the follicles and eggs grow optimally, no trigger shot is probably able to yield accurate quality eggs.