High-Normal Preconception TSH Levels Have No Adverse Effects on Reproductive Outcomes in Infertile Women Undergoing the First Single Fresh D5 Blastocyst Transfer

Table 2

General characteristics between pregnant and nonpregnant women.

	Nonpregnant	Pregnant
N	317	507
Age (years)	30.06 (4.15)	29.88 (3.79)	0.514
BMI (kg/m2)	23.36 (3.07)	23.7 (3.23)	0.136
AMH (pmol/L)	34.13 (20.9)	36.97 (22.98)	0.074
TSH (mIU/L)	2.43 (0.88)	2.36 (0.83)	0.260
FT4 (pmol/L)	16.45 (2.05)	16.61 (2.04)	0.282
Basal FSH (IU/L)	6.79 (1.75)	6.78 (1.73)	0.943
Endometrial thickness (mm)	11.56 (2.21)	11.82 (2.28)	0.108
Duration of infertility (year)	3.36 (2.56)	3.15 (2.37)	0.231
Number of retrieved oocytes	17.85 (4.46)	17.31 (4.7)	0.099
Insemination method of transferred blastocyst			0.350
IVF	258 (81.4%)	399 (78.7%)
ICSI	59 (18.6%)	108 (21.3%)
Quality of transferred blastocyst			0.005
Top quality	225 (71%)	403 (79.5%)
Nontop quality	92 (29%)	104 (20.5%)
Ovarian stimulation protocol			0.078
GnRH agonist	306 (96.5%)	499 (98.4%)
GnRH antagonist	11 (3.5%)	8 (1.6%)
Type of infertility			0.219
Primary	164 (51.7%)	240 (47.3%)
Secondary	153 (48.3%)	267 (52.7%)
Infertility treatments
None	209 (65.9%)	367 (72.4%)	0.268
IUI once	50 (15.8%)	65 (12.8%)
IUI twice	35 (11%)	47 (9.3%)
IUI more than 3 times	23 (7.3%)	28 (5.5%)
Causes of infertility
Male factors	62 (19.6%)	118 (23.3%)	0.036
Female mixed factors	14 (4.4%)	29 (5.7%)
Ovulation failure	27 (8.5%)	38 (7.5%)
Pelvic and fallopian tube factors	116 (36.6%)	162 (32%)
Factors on both sides	66 (20.8%)	133 (26.2%)
Unexplained	32 (10.1%)	27 (5.3%)