L. H. Narine, M. Vezmar, V. G. Sutija, B. Shah, S. Sidhu, R. H. Schwarz, M. Gudavalli
Mode of conception, placental morphology and perinatal outcome of twin
gestations
Objective: To compare the perinatal outcome and placental
morphology of twins conceived by assisted reproductive
technologies (ART) or natural conception
(NC).
Methods: The present retrospective study included
88 twin pairs. Methods of ART included in vitro fertilization,
intrauterine insemination, embryo transfer and
induced ovulation. Placental morphology was described
by chorionicity, amnionicity, placental weight, umbilical
cord insertion and the number of cord vessels. Perinatal
outcomes included maternal age, gestational age, birth
weight (BW), BW discordance and mode of delivery.
Results: The mothers of ART twins were 4 years older
than NC mothers. ART twins delivered 2.2 weeks earlier
than NC twins. The BW of ART twins A and B were less
than NC twins A and B. There was no difference in the
proportion of discordant twins in either group. Dichorionic
diamniotic (DD) placentas accounted for the majority
of placentas in both groups. There were no monochorionic-monoamniotic placentas in ART pairs, but
there were 2.9% in NC pairs. Mode of conception had
no effect on placental weight in DD or monochorionic-diamniotic
twins in either group except for larger DD
fused placentas in the ART group.
Conclusion: ART twin pairs were delivered at an earlier
gestational age at lower birth weights to older mothers
predominantly by cesarean section. This perinatal outcome
was not reflected by placental morphology.
Journal of Perinatal Medicine, Walter de Gruyter
Print ISSN: 1619-3997
Volume: 31, 03/2003
Pages: 99 - 104
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