In general, the answer is yes. Many experts, however, recommend no coitus for 2 to 3 days prior to an anticipated IUI to “build up” the male partner’s sperm count and volume. Also, some men may experience difficulty producing a specimen if they have recently had coitus. For men who have a low sperm count or motility, it is recommended that they abstain from sexual relations for 3 to 5 days prior to a planned IUI.
In patients who are at risk for hyperstimulation syndrome, it may be wise to refrain from sex until the ovarian response has been assessed. In patients with an excessive response to fertility drugs the cycle may be abandoned and yet ovulation could still occur. Since the sperm can survive up to 5–7 days after intercourse, a pregnancy could occur even in the setting of a cancelled IUI or IVF cycle.