1. Interleukin-1β and interleukin-1α may affect the implantation rate of patients undergoing in vitro fertilization–embryo transfer 
Evdokia E Karagouni, Ph.D., Athanasios Chryssikopoulos, M.D., Themis Mantzavinos, M.D., Nikos Kanakas, M.D., Eleni N Dotsika, Ph.D. 
Fertility and Sterility 
Volume 70, Issue 3, Pages (September 1998)
DOI: /S (98)00243-X

2. FIGURE 1
Concentration of IL-1β in the serum of 14 IVF-ET patients who conceived (•) and 19 patients who failed to conceive (○) on the days of hCG administration, oocyte retrieval (OR), and ET. The detection limit of the IL-1β assay was 3 pg/mL. Boxes represent the means ± SD (range) of values over the detection limit. ∗ indicates a statistically significant difference (P <.001) between the two groups of IVF-ET patients.
Fertility and Sterility  , DOI: ( /S (98)00243-X)

3. FIGURE 2
Concentration of IL-1α in the serum of 14 IVF-ET patients who conceived (•) or 19 patients who failed to conceive (○) on the day of hCG administration, oocyte retrieval (OR), and ET. The detection limit of the IL-1α assay was 5 pg/mL. Boxes represent the means ± SD (range) of values over the detection limit. ∗ indicates a statistically significant difference (P <.05) between the two groups of IVF-ET patients.
Fertility and Sterility  , DOI: ( /S (98)00243-X)