The patient should be able to see the uterus and both ovaries when the ultrasound is done. If the ultrasound does not reveal the right ovary, it is not normal. This situation suggests the following three possibilities: First, the patient has had pelvic or abdominal surgery to remove the right ovary, in which case the patient mostly has a history of surgery. Second, the patient’s right ovary normally exists or is diseased, but for some special reasons, such as obscuration by a huge tumor or inflammatory adhesions leading to abnormal ovarian position, so it is not seen when doing ultrasound. Third, it is important to consider that the patient’s ovaries are atrophied, so they cannot be detected. This condition is mostly seen in women with premature ovarian failure, or in postmenopausal women. In this case, the right ovary of the woman cannot be seen, and even if the left ovary can be seen, it will be very small.