1. Glutathione peroxidase activity in seminal plasma and its relationship to classical sperm parameters and in vitro fertilization-intracytoplasmic sperm injection outcome 
Lorena Crisol, B.S., Roberto Matorras, M.D., Ph.D., Fermín Aspichueta, B.S., Antonia Expósito, Ph.D., Maria Luisa Hernández, Ph.D., Maria Begoña Ruiz-Larrea, Ph.D., Rosario Mendoza, B.S., José Ignacio Ruiz-Sanz, Ph.D. 
Fertility and Sterility 
Volume 97, Issue 4, Pages e1 (April 2012)
DOI: /j.fertnstert
Copyright © 2012 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Activity of seminal plasma GPX according to the severity of (A) asthenozoospermia (NMT, ≥50% progressive motility; MA, <50% and >20%; SA, <20%), (B) oligozoospermia (NC, MO, and SO), and (C) teratozoospermia (NM, MT, and ST) presented in the patients under study (∗P<.001).
Fertility and Sterility  , e1DOI: ( /j.fertnstert )
Copyright © 2012 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
FRs according to mean GPX activity quartiles in (A) the whole study population, (B) abnormal motility group, (C) abnormal concentration group, and (D) abnormal morphology group. Q1, ± 2.42 mU/mL; Q2, ± 1.09; Q3, ± 0.98; and Q4, ± Values are mean ± SD.
Fertility and Sterility  , e1DOI: ( /j.fertnstert )
Copyright © 2012 American Society for Reproductive Medicine Terms and Conditions

4. Supplemental Figure 1
Activity of seminal plasma GPX in samples assessed as normal (N) and abnormal (A) by both the 1999 and 2010 WHO criteria. (∗P<.001).
Fertility and Sterility  , e1DOI: ( /j.fertnstert )
Copyright © 2012 American Society for Reproductive Medicine Terms and Conditions