Is there A Link between Serum Thyroid Stimulating Hormone Level and the Results of in vitro Fertilization and Embryo Transfer?

ObjectiveTo analyze the clinical features and outcomes in infertile patients with different levels of thyroid stimulating hormone (TSH) undergoing IVF/ICSI, and to investigate whether inappropriate level of TSH has the adverse effect on the results of the IVF-ET.MethodsA total of 389 patients undergoing IVF/ICSI from January 2009 to December 2011 were divided into 3 groups according to the basal TSH level: group A (TSH< 2.0 mIU/L), group B (TSH 2.0-4.5 mIU/L) and group C (TSH>4.5 mIU/L). Oocyte retrieved, fertilization rate, cleavage rate, available embryo rate, pregnancy rate and miscarriage rate were analyzed to explore whether serum TSH level was correlated with the results of IVF/ICSI.ResultsThere were no differences in number of oocyte retrieved, fertilization rate, cleavage rate and available embryo rate among 3 groups (P>0.05). Clinical pregnancy rate in group B (43.0%) was significantly higher than that in group A (30.2%) and group B (23.5%), respectively (P<0.05). There were no significant differences in miscarriage rate among 3 groups.ConclusionsTSH level has no effect on fertility rate or miscarriage rate in patients undergoing IVF/ICSI. Inadequacy TSH level would decrease the IVF/ICSI pregnancy rate.