The influence of assisted reproductive technology on growth discordance in dichorionic twin pregnancies
Shunji Suzuki1, Tomoaki Murata
1Department of Obstetrics and Gynecology, Japanese Red Cross Katsushika Maternity Hospital, Katsushika-ku, Tokyo, Japan. czg83542@mopera.ne.jp <czg83542@mopera.ne.jp>
Objective:
We examined the relation between first-trimester crown-rump length (CRL) discordance and birth weight discordance in dichorionic twin pregnancies conceived by assisted reproductive technology (ART).
Methods:
We examined 101 nulliparous dichorionic twin pregnancies producing male-male or female-female infants conceived spontaneously (n = 38) or following in vitro fertilization and embryo transfer (n = 63).
Results:
There were no significant differences in CRL disparity or birth weight discordance between spontaneous and ART-conceived dichorionic twin pregnancies. There was a positive correlation between CRL disparity and birth weight discordance in ART-conceived twin pregnancies (r(2) = 0.22, p = 0.02), while there was no such correlation in spontaneous pregnancies (r(2) = 0.02, p = 0.40).
Conclusion:
In ART-conceived dichorionic twin pregnancies, CRL disparity may be associated with birth weight discordance.
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