Table 3. Influence of the C447T polymorphism of the GDF-9 gene in patients undergoing IVF
Parameter	Genotype*			pϯ	Post Hoc	Allele*		p§
	CC (17)	CT (29)	TT (20)		pŧ	C (63)	T (69)
Menstrual cycle length (days)	27.5	30.0	28.5	0.128	-	28.7	29.2	0.518
Body mass index (kg/m2)	23.8	23.5	25.2	0.229	-	23.7	24.5	0.164
Antral follicle count (N)	10.0	9.7	12.4	0.199	-	9.9	11.2	0.139
Days of induction (N)	10.2	9.2	9.3	0.151	-	9.78	9.28	0.103
r-FSH (IU)	1455	1466	1581	0.457	-	1460	1532	0.239
Endometrial thickness (mm)	9.3	9.9	9.7	0.558	-	9.64	9.82	0.586
Follicles >17 mm on trigger day (N)	5.53	5.86	6.75	0.574	-	5.68	6.38	0.280
Follicles 14-16 mm on trigger day (N)	3.47	2.45	2.85	0.320	-	3.00	2.68	0.413
Follicles 12-14 mm on trigger day (N)	1.29	2.00	2.80	0.037	e0.356 f0.033	1.62	2.46	0.007
Total follicles (N)	9.76	8.79	10.40	0.637	-	9.32	9.72	0.696
Total oocytes (N)	10.47	9.59	11.00	0.822	-	10.06	10.41	0.803
MII oocytes (N)	8.41	7.31	9.05	0.644	-	7.90	8.32	0.714
MI oocytes (N)	0.76	0.79	0.60	0.842	-	0.78	0.68	0.632
VG oocytes (N)	0.88	1.24	1.10	0.795	-	1.05	1.16	0.708
FSH, 3rd day of menstrual cycle	5.55	5.02	6.83	0.460	-	5.28	5.99	0.408
E2, 3rd day of menstrual cycle	53.34	48.67	75.88	0.188	-	51.09	63.24	0.172
LH, 3rd day of menstrual cycle	4.99	4.28	4.33	0.782	-	4.63	4.31	0.578
AMH	1.87	1.75	1.23	0.621	-	1.82	1.45	0.341
LH, on trigger day	1.56	1.56	1.75	0.951	-	1.56	1.67	0.578
Progesterone (ng/ml), on trigger day	0.52	0.78	1.27	0.245	-	0.64	1.06	0.072
E2, on trigger day	1320	1072	1172	0.672	-	1199	1129	0.652
* T: thiamine; G: guanine ŧ Analysis of variance (ANOVA) ŧ Bonferroni test § t-test ǁ Difference between TT and CT § Difference between TT and CC