“Estrogen is primarily regarded as a:”

"Estrogen a key hormone in human physiology is primarily considered a female sex hormone due to its critical role in female reproductive development and function. It regulates menstrual cycles supports pregnancy and influences secondary sexual characteristics. While present in all genders its prominence in female physiology makes it a focal point in medical and social welfare studies particularly in women’s health initiatives. Understanding estrogen’s functions informs healthcare policies and interventions ensuring targeted support for reproductive health and gender-specific medical needs in social welfare systems."