Sperm donors produce their sample through masturbation into a sterile collection cup. It’s a straightforward process, but sperm banks have specific protocols around hygiene, timing, and sample quality that determine whether a donation is usable. Here’s what the full process looks like from start to finish.
What Happens in the Collection Room
At a sperm bank or fertility clinic, the donor is shown to a private room, typically stocked with visual aids like magazines or videos. The donor masturbates and ejaculates directly into a sterile, labeled container provided by the facility. The entire process takes as long as the donor needs, with no staff present in the room.
Before producing the sample, donors are expected to wash their hands and genital area thoroughly. This prevents bacteria from contaminating the specimen, which could compromise both the lab analysis and the sample’s viability for future use. The sterile cup should only be touched on the outside, and the donor avoids using lubricants, saliva, or condoms, all of which can damage or kill sperm cells.
Preparation Before Donation Day
Sperm banks ask donors to avoid ejaculating for a set period before their appointment. World Health Organization guidelines recommend two to seven days of abstinence. The timing matters because it affects the sample in competing ways: a longer abstinence period (around four days) produces a higher volume and sperm concentration, while a shorter period (around one day) yields sperm that swim better and function more effectively. Most banks aim for a window of two to five days as a practical compromise.
Donors are also typically asked to avoid alcohol, recreational drugs, and hot tubs in the days leading up to collection, since all of these can temporarily reduce sperm quality.
What Makes a Sample Good Enough
Not every sample gets frozen and stored. Sperm banks evaluate each donation for concentration and motility, which is the percentage of sperm that are actively swimming. A normal sample contains at least 20 million total sperm per milliliter, with at least 10 million of those being motile. At least 50% of the sperm in a sample should be live and swimming.
Donor sperm faces an even higher bar than these baseline numbers because freezing and thawing kills a significant portion of cells. Banks need the starting quality to be high enough that the sample remains usable after cryopreservation. Many prospective donors are rejected at this stage, even if their sperm count would be considered normal for natural conception.
The Screening That Comes First
Before a donor’s samples are ever released for use, federal regulations require extensive infectious disease testing. The FDA mandates screening for HIV-1 and HIV-2, hepatitis B, hepatitis C, and syphilis. Because these are reproductive cells, donors must also be tested for chlamydia and gonorrhea.
Here’s the part most people don’t realize: for anonymous donors, the sperm is quarantined for at least six months after collection. The donor then returns for a second round of testing. Only after that follow-up comes back clean is the original sample cleared for use. This quarantine period catches infections that might not have shown up on the initial test because the donor was in the early window of exposure.
What Happens to the Sample After Collection
Once the sample passes its initial quality check, lab technicians mix it with a cryoprotectant, a fluid that shields sperm cells from ice crystal damage during freezing. The mixture is then cooled gradually before being plunged into liquid nitrogen, where it’s stored at roughly negative 196 degrees Celsius. Samples stored this way can remain viable for decades.
Each donation is divided into multiple vials so that a single collection can be used for several treatment cycles. The vials are cataloged, linked to the donor’s profile and test results, and kept in secure storage tanks until a recipient selects that donor.
Home Collection and Shipping
Some sperm banks allow donors (or men banking their own sperm for personal use) to collect at home and ship the sample. Fairfax Cryobank, one of the largest U.S. banks, provides a collection kit with instructions and a prepaid overnight shipping label. The sample must be kept at room temperature, not refrigerated, and shipped the same day it’s produced for arrival by the following morning.
Home collection is less common for regular sperm bank donors, who typically visit the facility on a set schedule. But it’s a practical option for men storing sperm before medical treatments like chemotherapy, or for those who find it difficult to produce a sample in an unfamiliar clinical environment.
Surgical Retrieval for Special Cases
Standard sperm donation relies entirely on masturbation. But for men who have no sperm in their ejaculate, a condition called azoospermia, sperm can be retrieved surgically. This isn’t used for typical sperm bank donors but comes up in fertility treatment when a male partner can’t produce sperm through ejaculation.
The most common surgical approach is called micro-TESE, where a surgeon uses a high-powered microscope to identify and extract tiny tissue samples from the testicle that are most likely to contain sperm. Small pieces of tissue are sent to the lab during the procedure to check whether enough sperm has been found. The process can take up to four hours depending on how quickly viable sperm are located. Another method, called MESA, retrieves sperm from the epididymis (the coiled tube where sperm mature after leaving the testicle) and is used for men who have a physical blockage, such as after a vasectomy. Both procedures are done under anesthesia, and any extra sperm retrieved can be frozen for future fertility cycles.