[3] In field tests, SenesTech claims that using ContraPest led to a reduction in rat populations by approximately 40% over a period of 12 weeks or longer.

Loretta Mayer and Cheryl Dyer as part of a research program studying heart disease in post-menopausal women using menopausal mice.

[2][8][9] Studies conducted by SenesTech claim to demonstrate that prolonged consumption of ContraPest led to a significant decrease in rat fertility.

[1] A 2020 short-term laboratory trial with wild-caught adult black rats from Hawai'i indicated that exposure to ContraPest bait resulted in complete reproductive inhibition for at least 15 consecutive days before mating and throughout a 43-day breeding cycle.

Thus, if a dog or cat consumed a rat that had recently ingested ContraPest, it might experience temporary infertility as a minor side effect.