A short period of ejaculatory abstinence before intrauterine insemination is associated with higher pregnancy rates.
Marshburn PB, Alanis M, Matthews ML, Usadi R, Papadakis MH, Kullstam S, Hurst BS. A short period of ejaculatory abstinence before intrauterine insemination is associated with higher pregnancy rates. Fertil Steril. 2010 Jan; 93(1):286-8.