Table 1.
Characteristics of oocyte donors by body mass index (BMI) category, 2008–2015.
| Characteristic | Total | Donor BMI category, kg/m2 |
P valuea | ||
|---|---|---|---|---|---|
| ≤21 | 21.1–24.9 | ≥25 | |||
| No. of women | 338 | 97 | 181 | 60 | |
| Age at first retrieval, y | 25.5 (23.0–28.0) | 25.0 (23.0–28.0) | 26.0 (23.0–28.0) | 26.0 (23.0–28.0) | .79 |
| Year of retrieval | .15 | ||||
| 2008–2009 | 88 (26.0) | 25 (25.8) | 41 (22.7) | 22 (36.7) | |
| 2010–2011 | 107 (31.7) | 31 (32.0) | 57 (31.5) | 19 (31.7) | |
| 2012–2013 | 102 (30.2) | 34 (35.1) | 56 (30.9) | 12 (20.0) | |
| 2014–2015 | 41 (12.1) | 7 (7.2) | 27 (14.9) | 7 (11.7) | |
| Race | .12 | ||||
| White | 245 (74.7) | 71 (75.5) | 136 (76.8) | 38 (66.7) | |
| Black | 36 (11.0) | 6 (6.4) | 19 (10.7) | 11 (19.3) | |
| Other | 47 (14.3) | 17 (18.1) | 22 (12.4) | 8 (14.0) | |
| No. of previous births | .76 | ||||
| 0 | 263 (77.8) | 74 (76.3) | 144 (79.6) | 45 (75.0) | |
| 1 | 36 (10.7) | 9 (9.3) | 19 (10.5) | 8 (13.3) | |
| ≥2 | 39 (11.5) | 14 (14.4) | 18 (9.9) | 7 (11.67) | |
| Antimullerian hormone, ng/mL | 4.4 (3.0–6.6) | 4.6 (3.4–8.2) | 3.9 (2.8–6.5) | 4.8 (2.7–5.7) | .26 |
| Antral follicle count, n | 33.0 (25.0–41.5) | 32.0 (25.0–40.0) | 33.0 (26.0–41.5) | 34.0 (23.5–44.0) | .72 |
| Gonadotropin total dose, IU | 2,400.0 (1,950.0–2,850.0) | 2,250.0 (1,875.0–2,925.0) | 2,400.0 (2,025.0–2,850.0) | 2,400.0 (1,987.5–2,850.0) | .87 |
| Days of stimulation | .78 | ||||
| 8–9 | 88 (26.0) | 23 (23.7) | 47 (26.0) | 18 (30.0) | |
| 10–11 | 207 (61.2) | 60 (61.9) | 110 (60.8) | 37 (61.7) | |
| 12–13 | 43 (12.7) | 14 (14.4) | 24 (13.3) | 5 (8.3) | |
| Follicles >14 mm at trigger, n | 20.0 (16.0–25.0) | 20.0 (16.0–24.0) | 20.0 (16.0–25.0) | 20.0 (16.0–25.0) | .99 |
| Peak E2, pg/mL | 2,849.5 (1,882.0–4,548.0) | 2,979.0 (2,009.0–4,479.0) | 2,698.0 (1,842.0–4,197.0) | 3,247.5 (1,950.5–4,749.0) | .48 |
| Maturation trigger type | .70 | ||||
| hCG | 125 (37.1) | 36 (37.1) | 64 (35.6) | 25 (41.7) | |
| GnRH agonist (Lupron) | 212 (62.9) | 61 (62.9) | 116 (64.4) | 35 (58.3) | |
Note: Data are presented as median (interquartile range) or n (%). Amount of women with missing data: 10 for race, 203 for antimüllerian hormone (which was not routinely measured before 2012), 2 for antral follicle count, and 1 for maturation trigger type.
a
P values for differences across donor BMI categories were calculated with the use of chi-square tests for categoric variables and Kruskal-Wallis tests for continuous variables.