TABLE 6.
The relationship between the female age at OPU and position (θ) of the meiotic spindle relative to the polar body.
| Female age (years) | |||||
|---|---|---|---|---|---|
| <30 | 30–34 | 35–39 | 40–44 | ≥45 | |
| n (%) | n (%) | n (%) | n (%) | n (%) | |
| MII oocyte a | 582 | 1618 | 2093 | 1265 | 179 |
| θ = 0° | 250 (43.0) | 717 (44.3) | 857 (40.9) | 474 (37.5)§§ | 56 (31.3)*,§§ |
| 0° < θ ≤ 30° | 137 (23.5) | 360 (22.2) | 431 (20.6) | 259 (20.5) | 30 (16.8) |
| 30° < θ ≤ 60° | 71 (12.2) | 201 (12.4) | 259 (12.4) | 180 (14.2) | 22 (12.3) |
| 60° < θ ≤ 90° | 24 (4.1) | 77 (4.8) | 139 (6.6) | 80 (6.3) | 5 (2.8) |
| 90° < θ ≤ 180° | 13 (2.2) | 31 (1.9) | 59 (2.8) | 36 (2.8) | 4 (2.2) |
| PB/other | 12 (2.1) | 10 (0.6) | 14 (0.7) | 19 (1.5) | 2 (1.1) |
| Nonvisible spindle | 75 (12.9) | 222 (13.7) | 334 (16.0) | 217 (17.2) | 60 (33.5)**,§§,††,## |
Note: Holm test used to determine significance.
Abbreviations: MII, metaphase II; OPU, ovum pick up; PB, polar body.
**p <0.01, *p < 0.05, each group vs. <30 years. §§ p < 0.01, each group vs. 30–34 years. †† p < 0.01, each group vs. 35–39 years. ## p < 0.01, each group vs. 40–44 years.
a
Oocyte with first polar body regardless of visibility or any position of spindle.