Invention is an apparatus and a method for detecting first and subsequent drops of follicle fluid falling into a test tube as well as level of the follicle fluid falling into a test tube during an aspiration process. In one aspect of the Invention a pair of optical devices (emitter and detector) is positioned at opposite side of the test tube. The emitter emits a beam of light towards the detector. In another aspect the apparatus may be configured for detecting the level of the follicle fluid falling into the test tube. Upon detecting that the level reaches the pre-defined threshold level or droplet falling in the test tube, the apparatus may be further configured to notify a doctor via an audio alarm or visually through the ultrasound monitor.
