follicular phase (menstrual cycle)

Last reviewed 01/2018

  • first phase in the cycle
  • FSH stimulates growth in follicles
  • growth of one follicle outstrips others and produces inhibin leading to atresia of other follicles (those initially stimulated by FSH) as the levels of FSH fall during the mid-follicular phase
  • there is a marked increase in oestrogen production by the remaining (dominant) follicle that precedes ovulation