No abstract

Sonography is a reliable method for the study of the morphological development of the external genitalia in fetuses 'in vivo'; it is possible to assign fetal gender in 95 to 99% starting at a BPD of 20 mm and to achieve an accuracy rate of 99 to 100% from a BPD of 22 mm, but fetal sex assignment should not be undertaken below a BPD of 22 mm, and especially not in cases where fetal sexing affects pregnancy management.

No effect of the 2nd trimester amniocentesis was noted on fetal loss.

Poster abstracts just above the junction up to the renal pelvis with a diameter of 8.4 mm. 2D USG showed the renal calyceal dilatation (Figure 1), but the ureteral dilatation was difficult to identify because of the liquid containing image of the fetal intestines. With the aid of the 3D/4D USG view the insertion side of the right ureter in to the fetal urinary bladder was easily identified and measurement of the diameter done (Figure 1). Postnatal follow of the neonate showed no progression of the megaureter and hydroureteronephrosis.

Our data show that it is feasible to visualize and measure the pericallosal artery from an early stage of gestation, and this measurement could be an indirect indication of normal corpus callosum development.