Table 1:
Patient and delivery characteristics in IVF and non-IVF pregnancies
| Characteristics | IVF n = 3763 | Non-IVF n=65321 |
|---|---|---|
| Demographics | ||
| Maternal age at conception (years) | 35.9 (32.8–39.2) | 31.9 (28.6–35.0) |
| Race | ||
| Caucasian | 3098 (82.3) | 40194 (61.5) |
| African American | 143 (3.8) | 7915 (12.1) |
| Hispanic | 68 (1.8) | 3997 (6.1) |
| Asian | 286 (7.6) | 9939 (15.2) |
| Other | 164 (4.4) | 3034 (4.6) |
| Not reported/missing | 4 (0.1) | 242 (0.4) |
| Marital status | ||
| Married or partnered | 3508 (93.2) | 52745 (80.7) |
| Single | 218 (5.8) | 11254 (17.2) |
| Divorced, separated, widowed | 30 (0.8) | 761 (1.2) |
| Missing | 7 (0.2) | 561 (0.9) |
| Highest level of education achieved | ||
| High school or less | 308 (8.2) | 14163 (21.7) |
| College or associate’s degree | 1751 (46.5) | 27087 (41.5) |
| Graduate degree or higher | 1598 (42.5) | 19515 (29.9) |
| Missing | 106 (2.8) | 4556 (7.0) |
| Insurance | ||
| Public | 52 (1.4) | 10053 (15.4) |
| Private, other | 3711 (98.6) | 55267 (84.6) |
| Gravidity | ||
| 1 | 2211 (58.8) | 23710 (36.3) |
| 2 | 791 (21.0) | 20949 (32.1) |
| 3+ | 761 (20.2) | 20656 (31.6) |
| Missing | 0 (0.0) | 6 (0.01) |
| Parity | ||
| 0 | 2498 (66.4) | 30400 (46.5) |
| 1 | 1058 (28.1) | 23555 (36.1) |
| 2+ | 207 (5.5) | 11366 (17.4) |
| Diabetes prior to pregnancy | 81 (2.2) | 1028 (1.6) |
| Smoking prior to pregnancy | 48 (1.3) | 2147 (3.3) |
| Gestations | ||
| Singleton | 2547 (67.7) | 63898 (97.8) |
| Multiple | 1216 (32.3) | 1423 (2.2) |
| Delivery characteristics | ||
| Gestational age at delivery (weeks) | 38.0 (36.0–39.0) | 39.0 (38.0–40.0) |
| Preterm delivery | 1227 (32.6) | 7040 (10.8) |
| Intrauterine fetal demise | 12 (0.3) | 287 (0.4) |
| Mode of delivery | ||
| Vaginala | 1273 (33.8) | 41012 (62.8) |
| Cesarean | 2287 (60.8) | 23906 (36.6) |
| Vaginal and cesareanb | 199 (5.3) | 359 (0.5) |
| Missing | 4 (0.1) | 44 (0.1) |
| Birth weight (grams) | ||
| Singletons | 3290 (2920–3625) | 3360 (3025–3680) |
| Multiplesc | 2323 (1825–2710) | 2290 (1810–2645) |
Data presented as median (interquartile range) or n (%)
a
Includes dilation and evacuation for IUFDs
b
Some parturients who had multiples delivered both vaginally and via cesarean
c
Birthweights combined for all babies and averaged