Pregnancy

Pregnancy is the physiological state in which one or more embryos or fetuses develop within a female's uterus, typically spanning approximately 40 weeks of gestation from the last menstrual period divided into three trimesters.

In clinical and pharmacotherapeutic contexts, it serves as an indication for supportive maternal and fetal interventions, such as prenatal supplementation, cervical ripening, or labor induction.

Pathophysiologically, it involves fertilization, blastocyst implantation into the endometrium, formation of the placenta, and extensive maternal cardiovascular, hematologic, metabolic, and endocrinologic adaptations required to sustain embryonic organogenesis and fetal growth.