Please wait...
Contact Us
Need assistance? Contact us on below numbers

For Study plan details

10:00 AM to 7:00 PM IST all days.

For Franchisee Enquiry



Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this number

93219 24448 / 99871 78554

Mon to Sat - 10 AM to 7 PM

zona prlucida degenarates after-
A. before cleavage
B. after cleavage

Asked by anirbanbag81 7th November 2017, 4:29 PM
Answered by Expert
  • During the first week before implantation, the conceptus (product of fertilization) undergoes cleavage to form the blastocyst
  • Cells of the inner cell mass become aggregated and form the embryoblast that will form the tissues and organs of the embryo.
  • Cells of the outer cell mass become flattened and form the trophoblast that will contribute to the formation of the extraembryonic supportive membranes.
  • Around this time, the zona pellucida degenerates resulting in “hatching” of the blastocyst from its protective, but a restrictive coat.
  • Once the blastocyst is rid of the zona pellucida it is free to begin implantation into the wall of the uterus.
  • This implies that the zona pellucida degenerates only after cleavage.
Answered by Expert 7th November 2017, 6:31 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Free related questions

Chat with us on WhatsApp