Estradiol, or more precisely, 17Î²-estradiol, is a steroid and estrogen sex hormone, and the primary female sex hormone. It is named for and is important in the regulation of the estrous and menstrual female reproductive cycles.n the female, estradiol acts as a growth hormone for tissue of the reproductive organs, supporting the lining of the vagina, the cervical glands, the endometrium, and the lining of the fallopian tubes.
Ethnohistory is the study of ethnographic cultures and indigenous customs by examining historical records. It is also the study of the history of various ethnic groups that may or may not exist today. Ethnohistory uses both historical and ethnographic data as its foundation.
ethnography. (noun) A qualitative research method in which a researcher observes a social setting to provide descriptions of a group, society, or organization. Plural: ethnographies. 2  Also called descriptive anthropology. 3  Ethnography used in a sentence: I completed an ethnography of a domestic violence shelter. 4  An (noun) ethnographer uses the research methodology of ethnography to produce (adjective) ethnographic or (adjective) ethnographical work (adverb) ethnographically.