To BD, or not to BD...that is the question...?

Due to me having the flu, my husband and I have not BD'd in about 2 weeks. I am scheduled for an IUI on Wednesday. I have always heard in order to get a good count with good motility, my husband would need to every 2-3 days. So, my question is, should we do it tonight and only give him 1 day to "replenish", or should I have him wait until Wednesday morning?