This edition has updated material on the National Incident Management System, National Response Plan, National Response Framework, and National Fire Protection Association Standard 1600; coverage of the World Trade Center Site litigation and effects on responders; more on post-traumatic stress disorder; expanded and updated material on the history, ...
Mesocycles are typically 3 to 4 weeks in length but can be a bit longer. Two very common mesocycles are 21 and 28-day training blocks. I will provide an example of a training plan with 21-day mesocycles in my next post.
On average this occurs about twice a year or every six months, although it varies from dog to dog. When cycling first begins, there may be a great deal of variability in the time between cycles. This is normal. Some females take eighteen months to two years to develop a regular cycle.