Obstetric outcome of singleton pregnancies conceived by in vitro fertilization and ovulation induction compared with those conceived spontaneously.
OBJECTIVE
To compare the obstetric characteristics of singleton pregnancies conceived by IVF and ovulation induction with those conceived spontaneously.


METHODS
Case-control study.


METHODS
Tertiary care medical center.


METHODS
All singleton pregnancies that were achieved by IVF (n = 169) and ovulation induction (n = 646) and were delivered from January 1989 through December 1994 were evaluated. Each group was compared with a separate control group that conceived spontaneously (n = 469 and n = 1,902 for the IVF and ovulation induction groups, respectively) and delivered during the same period and was matched in terms of maternal age, gestational age, and parity.


METHODS
Ovulation induction, IVF-ET.


METHODS
Obstetric complications.


RESULTS
Multivariate analysis showed that patients who conceived by IVF and ovulation induction had a significantly higher risk for gestational diabetes mellitus (odds ratio [OR] = 2.0; 95% confidence interval [CI] = 1.23-3.30 and OR = 1.9, 95% CI = 1.09-1.79, respectively), pregnancy-induced hypertension (OR = 2.1, 95% CI = 1.04-4.10 and OR = 1.5, 95% CI = 1.04-2.02, respectively), and cesarean section (OR = 3.6, 95% CI = 2.44-5.29 and OR = 1.4, 95% CI = 1.09-1.79, respectively) compared with their matched controls.


CONCLUSIONS
After controlling for maternal age, gestational age, and parity, we demonstrated that singleton pregnancies conceived by IVF and ovulation induction are at increased risk for maternal gestational diabetes mellitus and pregnancy-induced hypertension, and at greater risk for delivery by cesarean section.
Department of Obstetrics and Gynecology, Soroka University Medical Center of Kupat Holim, Ben Gurion University of the Negev, Beer Sheva, Israel.
E
E
Maman
E
E
Lunenfeld
A
A
Levy
H
H
Vardi
G
G
Potashnik
D000328:Adult; D036861:Delivery, Obstetric / Q000379:methods; D005260:Female; D005306:Fertilization; D005307:Fertilization in Vitro; D006801:Humans; D016015:Logistic Models; D008423:Maternal Age; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D011248:Pregnancy Complications; D011256:Pregnancy Outcome; D018566:Pregnancy, High-Risk; D012044:Regression Analysis