Abstract: Angiogenesis is a special mechanism that occurs in organs with cyclic variation after the birth of mammal. Ovary is the organ with the characteristic of obvious cyclic variation, where follicle develops from atresia and corpus luteum forms from degradation. Vascular endothelial growth factor (VEGF) and angiotensin (Ang) play important roles in regulating the cyclic variation of ovarian vessel and the time-space characteristics of the two gene expression are closely linked to cyclic variation of vessel.

Key words: ovary; angiogenesis; VEGF; Ang