If the follicle develops to 18~23mm, it can be retrieved; for those who adopt the in vitro maturation program for immature eggs, the eggs can be retrieved when the follicle grows to 14mm.
Egg retrieval is a key step in in vitro fertilization reproductive technology, generally using ovulation drugs to make follicular development, to be follicular development and maturity, that is, the follicle volume of 18~23mm, follicular fluid increased dramatically, follicular lumen increased, follicles protruding towards the surface of the ovary, the ovarian mound, radiocolla, granulosa cells and other tissues are formed, then you can retrieve the eggs.
In the gonadotropin-releasing hormone agonist antagonist ovulation promotion program, if the immature egg in vitro maturation program is adopted, the eggs can be retrieved when the follicle grows up to 14mm, and then after in vitro cultivation and maturation, the follicular plasma single sperm injection technique can be carried out.
The clinician will need to make a comprehensive assessment of the patient’s condition before taking targeted egg retrieval measures.