Define arrow. arrow synonyms, arrow pronunciation, arrow translation, English dictionary definition of arrow. n. 1. A missile having a straight thin shaft with a pointed head at one end and often flight-stabilizing vanes at the other, meant to be shot from a bow.
FSH stimulates the growth and recruitment of immature ovarian follicles in the ovary. In early (small) antral follicles, FSH is the major survival factor that rescues the small antral follicles (2â5 mm in diameter for humans) from apoptosis (programmed death of the somatic cells of the follicle and oocyte).
During this phase, the pituitary gland, located at the base of the brain, releases two hormones, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), which stimulate the ovary and cause follicular growth. The developing follicle secretes the hormone estrogen, which has several important roles in the body.