Monitoring ovulation by means of an ultrasound machine is one of the procedures used in the diagnostics of infertility. The procedure is performed with a transvaginal probe.

Time for the examination

In regular cycles - that is 28 +/- 2 days: ovulation usually occurs between the 12th and 14th day of the cycle, counting from the first day of menstruation. Ovulation is monitored from the 10th‑11th day of a cycle every 2 days (in some cases, everyday), marking the number and diameter of the largest follicles in both ovaries and the endometrium.

In irregular cycles: ovulation can occur on a different day than between the 12th and 14th day of a cycle, counting from the first day of menstruation. As a result, more ultrasound examinations might be necessary.

Before the examination 

Empty your bladder before the ultrasound examination.