Human Fertilization - Fertilized human egg pictures from IVF, in vitro fertilization
Picture of IVF fertilized egg at high magnification
Male and female genetic material (DNA) is in the 2
pronuclei (circular structures) in the center
Polar body is seen at one o'clock - just under the shell
- The (ovarian) cumulus cells around the egg (see egg images) have been stripped off
- This is what we see at the "fertilization check" the morning after the IVF egg retrieval procedure
- Evidence of fertilization is shown by the presence of the 2 pronuclei in the center
- Without fertilization, the egg would look the same, but without any pronuclei
- When 3 pronuclei are present instead of 2, then it is a triploid zygote - which has an extra set of 23 chromosomes - and can not make a normal baby.
- A fertilized egg is also called a "zygote", a "1 cell embryo" or a "2 pronuclear embryo"