Day 15 Ovarian Sonogram.

Day 15 Ovarian Sonogram.
The left ovary in the upper sonogram shows 1 corpus luteum, the right ovary in the lower sonogram show shows 2 corpora lutea and a small follicle. Legend: 1 = follicle, 2 = corpus luteum, 3 = corpus luteum with a cavity, 9 = trabecula.

Pieterse MC (1999)