There are many definitions of internal control, as it affects the various constituencies (stakeholders) of an organization in various ways and at different levels of aggregation.
Usually, the range is $35-$50 per specimen. Banks often require a six-month gap between production and complete payment. That is, they will not release payments to a sperm donor until he has completed the second set of blood tests; six months after the first set were done.
A sperm donor will usually donate sperm to a sperm bank under a contract, which typically specifies the period during which the donor will be required to produce sperm, which generally ranges from six to 24 months depending on the number of pregnancies which the sperm bank intends to produce from the donor.