Monitoring scan

Monitoring scans are done every few days during stimulation to count and measure follicles and check the endometrial thickness. Together with blood hormone levels they decide dose adjustments and when to trigger. They are short, usually internal, and take place in the morning so results can be acted on the same day.

Also known as: follicular monitoring, tracking scan, follicle scan, baseline scan

Last reviewed: 8 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.