The prospective parents are checked for infectious diseases that can be transferred to the surrogate. The screening is performed through blood tests, physical examinations, and questionnaires. The Food and Drug Administration (FDA) required that this testing is done within a month of the egg retrieval and within a week of collecting the sperm. Although these tests don’t completely remove the risk of transmission, they significantly reduce them. The surrogate should also be advised that embryos could be frozen and stored for six months to retest the hopeful parents. However, this may lower the chances of achieving pregnancy.