Table 3.

Participant characteristics in the included studies.

Author, year of publication	Age (yr, intervention vs controls)	TSH (mU/L, intervention vs controls)	Number of oocytes retrieved (intervention vs controls)	Gn dose/oocyte (IU, intervention vs controls)	Good quality embryos (intervention vs controls)
Litwicka 2015[19]	34.6 ± 3.2 vs 35.0 ± 3.2	1.2 ± 0.1 vs 1.8 ± 0.6	11.2 ± 4.4 vs 10.8 ± 4.6	Unstated	1.0 ± 0.8 vs 0.8 ± 0.6
Turi 2010[18]	34.4 ± 3.8 vs 33.6 ± 2.1	1.96 ± 0.71 vs 2.01 ± 0.23	Unstated	Unstated	Unstated
Revelli 2009[17]	35.7 ± 3.8 vs 37.0 ± 3.5	2.1 ± 1.5 vs 2.0 ± 1.2	10.7 ± 6.4 vs 6.5 ± 4.3	448 ± 520 vs 1028 ± 1141	Unstated