Table 1: Maternal Characteristics among ART and Spontaneously Pregnant Groups.

From: Maternal and Live-birth Outcomes of Pregnancies following Assisted Reproductive Technology: A Retrospective Cohort Study

 ART (n = 2641)Controls (n = 5282)
IVF (n = 2327)ICSI (n = 314)
Maternal age (years)31.87 ± 3.9631.62 ± 3.9831.73 ± 3.21
Gravidity
 1948 (40.7)ab197 (62.7)a2477 (46.9)
 ≥21379 (59.3)117 (37.3)2805 (53.1)
Parity
 12100 (90.2)a292 (93.0)a4328 (81.9)
 ≥2227 (9.8)22 (7.0)954 (18.1)
Maternal education
 <Secondary school71 (3.1)a6 (1.9)103 (1.9)
 Secondary school943 (40.5)ab98 (31.2)a1293 (24.5)
 College graduate1235 (53.1)a187 (59.6)a3560 (67.4)
 Post-graduate78 (3.4)ab23 (7.3)326 (6.2)
Caesarean Section2117 (91.0)ab209 (66.6)3210 (60.8)
Previous cesarean delivery
 Yes64 (2.8)a10 (3.2)a431 (8.2)
 No2263 (97.2)304 (96.8)4851 (91.8)
Pre-pregnant BMI21.69 ± 2.82a21.58 ± 2.73a20.71 ± 2.74
Birth plurality
 Singletons1450 (62.3)a209 (66.6)a5193 (98.3)
 Twins877 (37.7)105 (33.4)89 (1.7)
  1. Note: Values are n (%) or mean (±standard deviation). ART, assisted reproductive technology; IVF, in vitro fertilization; ICSI, intracytoplasmic sperm injection; BMI, body mass index. Bonferroni corrected p-value = 0.016. aSignificantly different from control group (P < 0.016). bSignificantly different from ICSI group (P < 0.016).