An evidence-based whelping methodology grounded in circadian biology, melatonin physiology, and canine reproductive endocrinology. Developed by the Institute of Canine Biology.
Developed by Carol Beuchat, PhD · instituteofcaninebiology.org
Dark Whelping™ is not simply turning off the lights. It is a structured, evidence-based protocol with defined environmental conditions designed to protect the maternal hormonal environment during labor and delivery.
Dark Whelping™ is the management of the whelping environment to eliminate artificial light exposure during labor and delivery, based on the established role of melatonin in supporting uterine contractility and perinatal outcomes. The protocol specifies light conditions, timing, and environmental parameters derived from the peer-reviewed science of mammalian circadian biology and reproductive endocrinology.
The distinction matters. A bitch whelped in a darkened room without adherence to the full protocol is not a Dark Whelping™. The term describes a specific methodology, not a casual management choice. ICB is the originating organization and the sole authority on what constitutes a valid Dark Whelping™.
The Dark Whelping™ protocol is grounded in a convergence of established findings in mammalian physiology. The core mechanism involves melatonin — a hormone whose production is directly suppressed by light — and its role in supporting effective uterine contractions during labor.
Melatonin is produced by the pineal gland only in the absence of light. Artificial light at night — including the low-level lighting typical of supervised whelpings — suppresses melatonin production. This is not a subtle effect; it is the primary regulatory mechanism of the mammalian circadian system.
Melatonin receptors are expressed in uterine smooth muscle in multiple mammalian species. Melatonin acts synergistically with oxytocin to support effective uterine contractions. Suppression of melatonin during labor may impair this pathway, contributing to weak or poorly coordinated contractions.
Uterine inertia — contractions insufficient to deliver pups — is a leading cause of canine dystocia and perinatal mortality. Prolonged labor increases the risk of fetal hypoxia and oxidative stress at birth, with potential consequences for health across the lifespan under the DOHaD (Developmental Origins of Health and Disease) framework.
The hypothesis, developed by Carol Beuchat PhD at the Institute of Canine Biology, proposes that artificial light during whelping suppresses maternal melatonin, impairing melatonin-oxytocin synergy, increasing the risk of uterine inertia, perinatal hypoxia, and downstream oxidative stress-related disease in offspring.
The ICB Dark Whelping Registry will collect outcome data from certified dark-whelped litters across breeds to formally test and quantify these effects.
ICB is developing a formal certification program. Only breeders who have completed ICB training and adhere to the defined protocol are authorized to describe their whelping practice as Dark Whelping™.
An online course covering the science, the protocol requirements, and the standards for environmental management.
Certified breeders implement the full protocol as specified by ICB, not a partial or informal approximation of it.
Certified litters are eligible for submission to the ICB Dark Whelping Registry — a citizen science database tracking health outcomes across breeds. Registry data is the scientific foundation of the program.
Notice regarding use of the term "Dark Whelping™": Dark Whelping™ is a trademark of the Institute of Canine Biology. Use of this term to describe a commercial service, whelping program, or breeding practice without ICB certification is not authorized. The term refers to a specific, defined protocol — not a general practice of whelping in reduced light.
The Dark Whelping™ certification program is in development. Breeders who want to be notified when training is available, or who have questions about the protocol or the registry, should contact ICB directly.
info@instituteofcaninebiology.org