Regulated is the right word. Regulation is used in biology also; and can be used to describe the coagulation process. For example, there are regulators to keep the blood clotting process in check. It is a highly regulated system to prevent problems like thrombosis (blood clots blocking veins or arteries). We can also use the term to describe hemostasis (or haemostasis), the process to prevent and stop bleeding, which involves coagulation.
The coagulation system is a highly regulated cascade that ultimately leads to blood clot formation. The primary purpose of coagulation is hemostasis, i.e., to stop bleeding from a damaged blood vessel.
The concept of a stepwise process or cascade of the coagulation system was first described in 1964.
Göbel K, Eichler S, Wiendl H, Chavakis T, Kleinschnitz C and Meuth SG (2018) The Coagulation Factors Fibrinogen, Thrombin, and Factor XII in Inflammatory Disorders—A Systematic Review. Front. Immunol. 9:1731. doi: 10.3389/fimmu.2018.01731 - frontiersin.org
OED definition of the adjective regulated:
Properly controlled, governed, or directed; subject to guidance or regulations. Also: adjusted in response to, or in order to conform to, a principle, standard, set of circumstances, etc.
Also well-regulated (adj):
Properly governed or directed; (now) esp. strictly controlled by rules or regulations. Also: accurately calibrated or adjusted. - OED
Hemostasis is a physiological process that leads to sealing of avasculature break. It must be well regulated, fast and localized. Coagulation is the result of a complex sequence of biochemical reactions, called the coagulation cascade.
Padovani, Francesco & Duffy, James & Hegner, Martin. (2017). Nanomechanical Clinical Coagulation Diagnostics and Monitoring of Therapies. Nanoscale. 9. 10.1039/C7NR06992H. - researchgate.net
A more general timewise word is well-timed which occured to me when I read the title of the question. However, this word has two senses and the second sense is more appropriate for the context, as listed in OED:
1. Occurring, done, or made at a suitable or favourable time; timely, opportune.
2. Performed or used at regular intervals or according to a regular pattern; carried out with precise or accurate timing.
Well-timed is used in biology also. Here are two examples I've found where one of them is in blood coagulation context:
Blood coagulation requires well-timed orchestration of soluble plasma proteins with hematopoietic and vessel wall cellular mediators.
Kretz, Colin & Weyand, Angela & Shavit, Jordan. (2015). Modeling Disorders of Blood Coagulation in the Zebrafish. Current Pathobiology Reports. 3. 10.1007/s40139-015-0081-3. - researchgate.net
Like many biological processes, cell division involves a well-timed, complex coordination of proteins and cellular machinery.