Which of the following layers in an antral follicle is acellular?

  1. A) Zona pellucida
  2. B) Stroma
  3. C) Theca interna
  4. D) Granulosa

Answer:A) Zona pellucida

Explanation: The tertiary follicle and Graafian follicle are also known as antral follicles due to the presence of antrum, i.e. the fluid-filled cavity. The acellular layer in the antral follicle is zona pellucida, which surrounds the oocyte. It is made up of a glycoprotein matrix. Zona pellucida layer is secreted by both oocytes and follicles. It is surrounded by corona radiata.

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