Kenya coast galagos are polygynous—males mate with multiple females. The females’ estrus period lasts between one to three days, during which the males compete heavily for breeding rights. They increase their home range, their body weight, and even the size of their testes to give them the best chance at mating. Larger males tend to monopolize females, breeding with them multiple times to ensure the best chance of fathering their offspring. Smaller males, while less successful overall, do have their own strategy. They tend to be opportunistic, sneaking under the radar to mate with as many females as they can. While they are less successful than the dominant males, they are successful enough to contribute to the next generation.

While pregnant, an expectant mother constructs a nest where she gives birth and subsequently raises her offspring. Sometimes, she may take advantage of her surroundings and use an abandoned bird nest or tree hollow instead. Matings occur twice per year, and, after a four-month gestation, result in births between January and February and between October and November. Female Kenya coast galagos give birth to a single offspring, rarely twins, twice per year. Newborn Kenya coast galagos are fully furred and have their eyes open. Their mother carries them by the scruff of their neck for about 50 days, and they are weaned at about three months of age. However, the babies may start to catch insects for themselves at about a month old. Mothers park their infants in safe locations while they forage, checking in with them occasionally. The baby stays quiet and unmoving. If left too long or if in danger, the baby lets out a distress call and the mother comes to check on them. If she senses danger, she moves her baby to a new location. When the baby is about 10 months old, they reach sexual maturity and males leave their natal groups.