Final answer:
The correct answer is ovulation, which is the process of releasing a secondary oocyte from the follicle into the Fallopian tube around day 14 of a typical 28-day menstrual cycle.
Step-by-step explanation:
The release of the secondary oocyte from a vesicular follicle on day 14 of a 28-day ovarian cycle is called ovulation. This is a key event during the menstrual cycle and should not be confused with fertilization, menstruation, or implantation, which are distinct processes within the reproductive cycle. After puberty, each month one follicle matures and its primary oocyte completes meiosis I to produce a secondary oocyte, which begins meiosis II.
The empty follicle transforms into a structure called the corpus luteum, which plays a role in hormone production. If the secondary oocyte is fertilized by a sperm, it completes meiosis II, forming a zygote which may eventually implant in the uterus. However, if fertilization does not occur, the secondary oocyte will disintegrate.