When both fallopian tubes appear normal, tubal selection for GIFT is l
eft, to the surgeon's discretion. We were interested to learn whether
pregnancy rates were influenced by the choice of tubal transfer in rel
ation to ovarian dominance. Ovarian dominance was defined sonographica
lly as the ovary containing the greater number of follicles having a m
ean diameter > 16 mm. In a retrospective analysis of 144 GIFT procedur
es, the clinical pregnancy rate for transfers performed to the tube ip
silateral to the dominant ovary was significantly higher than that of
transfers made to the contralateral tube (0.414 versus 0.228, P = 0.04
2). This difference could not be attributed to either patient characte
ristics or cycle performance. We suggest that gamete transfer be perfo
rmed ipsilateral to the side with the greater number of dominant folli
cles to optimize pregnancy rates.