Definition of progestational in US English:

progestational

adjective

Physiology Medicine
  • Relating to or designating physiological changes that occur in preparation for pregnancy, especially those of the uterine lining before implantation of the fertilized ovum. Also: causing such changes; having physiological effects resembling those of progesterone.

Origin

1920s. From pro- + gestational.

Pronunciation

progestational

/ˌprəʊdʒɛˈsteɪʃən(ə)l/