Trans-vaginal oocyte retrieval using a trans-vaginal sector scan probe combined with an automated puncture device.

A new trans-vaginal sector scanning ultrasound probe has been developed providing a forward viewing sector of 240 degrees. Due to its rotating one-beam scanner, the images of the uterus and the ovaries with their follicles are of high resolution and are clearly outlined on the screen. An automated puncturing device has been adjusted to this probe which gives the surgeon more precision in placing the tip of an aspiration needle into the middle of the follicle. This combination of a trans-vaginal ultrasound probe with an automated puncturing device for aspirating oocytes for in-vitro fertilization avoids the need for a full urinary bladder, with less discomfort for the patients and permits easy orientation because the organs of the pelvis are within a close range. More accurate follicular punctures can thus be performed. First experiences with 40 oocyte retrievals revealed that 79% of oocytes were recovered and the incidence of clinical pregnancy was 17.5%.