Table 2. The comparison of ovulation quantity and oocyte morphology of the 3 groups.
| Results | Control | CSE | Menadione | |
| Ovulation Quantitya (/mouse mean±SE) | 12.00±2.05 | 21.86±3.70 | 17.43±4.31 | |
| Oocyte Morphology | ZP thicknessa (µm mean±SE) | 7.59±0.07* | 7.43±0.05 | 7.31±0.06 |
| ZP-free ODa (µm mean±SE) | 76.56±0.12# | 76.10±0.13 | 76.41±0.12 | |
| PVSb (µm median) | 9.1328* | 9.2818* | 10.0474 | |
| ODc (µm median) | 100.7656 | 100.6098 | 101.1314 | |
| ARS-PB rate (%) | 15.19%# | 6.62% | 7.62% | |
| SSR-PB rate (%) | 7.59%# | 24.26%* | 13.33% | |
| Immature oocyte rate (%) | 3.57% | 3.27%* | 9.84% | |
| The rate of broken PB (%) | 2.47% | 8.11% | 4.55% | |
ZP: zona pellucida. PVS: perivitelline space. OD: oocyte diameter. ARS-PB: the first polar body with appropriate size, round shape and smooth surface. SSR-PB: the first polar body with small size, strip-like shape and rough surface. CSE: cigarette smoke extract.
a
The data was normally distributed (P>0.05, Shapiro-Wilk), with equal variances (P>0.05, ANOVA).
b
The data from at least one group was not normally distributed (P<0.05, Shapiro-Wilk test).
c
The data was not normally distributed (P<0.05, Shapiro-Wilk test).
*<0.05 versus menadione.
#
<0.05 versus CSE.