We prefer that all specimens for analyses be collected on-site in our private, comfortable, collection room. All specimens need to be collected after an abstention from ejaculation for two to five days prior to providing the sample. Shorter or longer periods of abstinence may yield suboptimal semen specimens. Complete semen collection instructions will be supplied to you in writing when you schedule your appointment. A physician order is required for this test to be completed by our andrology laboratory.