1. Comparison of the effectiveness of single intrauterine insemination (IUI) versus double IUI per cycle in infertile patients 
Saeed Alborzi, M.D., Shahdokht Motazedian, M.D., Mohammad E Parsanezhad, M.D., Sima Jannati, M.D. 
Fertility and Sterility 
Volume 80, Issue 3, Pages (September 2003)
DOI: /S (03)

2. FIGURE 1
Clinical pregnancy rates after single and double IUI in patients with unexplained infertility (hatched bars), cervical factor infertility (gray bars), or male factor infertility (white bars).
Alborzi. Single and double IUI.Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )

3. FIGURE 2
Number of pregnancies by treatment with single IUI (diamonds) or double IUI (squares) in all patients.
Alborzi. Single and double IUI.Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )