____1.the first occurrence of menstruation. ____2.this occurs when fertilization does not take place. ____3.at this stage,the progress of fertilization may take place. ____4.this hormone stimulate your ovaries to produce around 5 to 20 small sacs called follicles. ____5.this is the lining of the uterus that becomes thicker in preparation for implantation of the ferrilized egg.
