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Is it harmful if the follicles grow fast and only a few days of stimulation are necessary?

By Elena Santiago Romero M.D. (gynecologist).
Last Update: 01/31/2025

Rapid follicle growth during ovarian stimulation for in vitro fertilization (IVF) is a concern often experienced by patients who are about to undergo ovarian stimulation.

Controlled ovarian stimulation is primarily aimed at inducing the development of multiple follicles in the ovaries to increase the chances of obtaining multiple quality eggs for IVF. The rate of follicle growth can vary from woman to woman and from cycle to cycle. Some women may experience rapid follicle growth, which means that the follicles reach the optimal size for egg retrieval in less time.

This rapid growth is not considered harmful in itself, but it is important for the medical team to follow up closely to ensure that the follicles are mature and ready for retrieval at the appropriate time. Rapid follicle growth may require more frequent monitoring during the stimulation cycle to ensure that the best possible results are obtained.

In some cases, rapid follicle growth may be a sign of a particularly favorable ovarian response to treatment, which may increase the likelihood of IVF success.

In summary, rapid follicle growth during ovarian stimulation is not usually considered harmful and may be indicative of a positive ovarian response to treatment. However, careful and personalized follow-up by the medical team is essential to ensure that the follicles are in their best condition for egg retrieval at the appropriate time. Open communication with the medical team is key throughout the assisted reproduction process.

 Elena Santiago Romero
Elena Santiago Romero
M.D.
Gynecologist
Bachelor's Degree in Medicine and Surgery from the Autonomous University of Madrid. Master's Degree in Human Reproduction from the King Juan Carlos University and the Valencian Infertility Institute (IVI). Several years of experience as a gynecologist specializing in Reproductive Medicine.
License: 282864218
Gynecologist. Bachelor's Degree in Medicine and Surgery from the Autonomous University of Madrid. Master's Degree in Human Reproduction from the King Juan Carlos University and the Valencian Infertility Institute (IVI). Several years of experience as a gynecologist specializing in Reproductive Medicine. License: 282864218.