In most cases the parasite's eggs develop in approximately two weeks. The length of the incubation period depends entirely upon the host's internal body temperature. There are some species who are ill suited as hosts, the majority of them being fire types.

As the eggs mature and incubate, their size rapidly increases and their shells secrete a pink viscous fluid. This fluid is partially absorbed by the host's body through the seminal vesicles.

The fluid, once in the host's blood stream, throws off the biochemical and hormonal balance of the host. This often results in a marked increase in the host's libido. It can reach a point where the host may have trouble concentrating past their own induced arousal.

Additionally, this fluid gradually increases the elasticity of the seminal vesicles and forces them to develop an external layer of muscle. In effect, it mutates the vesicles into a pseudo-uterus to support the eggs. It also modifies them to best nurture the eggs on top of their original function.

The fluid also serves to help prepare the host's body for the act of laying the eggs. The genital fluids their body produces becomes laced with a portion of the pink slime, forcing the tissues it comes into contact with to become more elastic. It is not uncommon to see a host's genitals drooling with this fluid mix in the later stages of the infestation. At this point they are considered to be "pregnant".

When the eggs have sufficiently matured, they begin secreting a new hormone which induces the new seminal vesicle muscles to rhythmically contract. This is the beginning of the host's "labor" process.

The eggs are pushed out of the seminal vesicles and enter the urethra. From here the contractions of the adapted urethral muscles push them further along until they exit the host's body. The contractions can become quite intense, and the sensation of the eggs passing through the "mutated" urethra can drive the host crazy with arousal (due to the increase in the number of nerve endings in the urethra during the "adaptation" process), though this varies from one host to another.

Most hosts equate the experience to one really long and drawn out orgasm. Some have reported being barely able to move after they were done. Others have reported having a strong urge to masturbate or engage in intercourse just before "labor" begins. But again, the effects vary from host to host. It should be noted that it is entirely possible for hosts engaged in intercourse during their "labor" to lay the eggs in their partner's body.

The eggs, when laid, are many times larger than when they were first implanted. They visibly stretch the penile urethra out as they are propelled by the contractions. Yet their size when laid is dependent on two factors.

The first factor is the age of the parasite that implanted them. The second is how many times the host has been infested in total. A host who has been infested before is already adapted for incubating the eggs and said eggs will both grow larger and further adapt the host's body to carry the larger brood.

If a host has been infested at least five times, they will appear about eight months pregnant with the eggs by the twelfth day of infestation. Their belly may or may not look bumpy, depending on how the eggs have settled in the host's seminal vesicles.

However, a host who has been infested a total of six times has reported experiencing a brief sensation of pain and an intense itching feeling within their groin along side a small amount of bleeding from their penile urethra. Examinations have revealed that one of the eggs had hatched inside their vesicles. The larva had burrowed into the nearby prostate tissue directly and then merged into it, leaving only its ovipositor connected to the seminal vesicles. This "fusion" makes them impossible to safely remove without permanent damage or sterility. It has become a part of their body for the rest of their lives.

This bonding has shown us that the creature fused into their prostate regularly implants eggs within the host's seminal vesicles. It has also shown us that the parasite only implants a new clutch of eggs once per month almost like clockwork. The two week average incubation cycle remains unchanged. However, this "bonding" only happens once. Future clutches do not see any parasites hatching within the host.

One interesting thing to note is that other "dickworm" parasites are able to identify bonded hosts and will avoid them. It is probably a pheromone signal, or some other biochemical flag the host's body begins producing after being bonded to a dickworm.

And finally, the infestation, incubation, and oviposition stages work differently for pure females. That will be discussed at a later date.