The same day as the eggs are retrieved is usually when the sperm is prepared. Sperm for the male partner is usually produced on the day and prepared in the laboratory depending on the quality of the sperm. Frozen sperm, either from the partner or from a donor, can be thawed and prepared on the day as well.
If a partner has no sperm in his ejaculate we can extract sperm directly from the testis performing a testicular biopsy. If there is any sperm in the sample we will find it to ensure every patient has the potential of having a baby of their own!