Multiple choice

At which stage of development is ovum released from ovaries?

  1. Primary oocyte

  2. Secondary oocyte

  3. Tertiary oocyte

  4. Zygote

  5. Quaternary stage

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The tertiary follicle changes into the mature follicle or Graafian follicle. The secondary oocyte forms a new membrane called zona pellucida surrounding it. The Graafian follicle now ruptures to release the secondary oocyte (ovum) from the ovary by the process called ovulation.