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Babies who had our help

Abnormally fertilized triploid human egg

Triploid one-cell embryo

Triploid human zygote
3 pronuclei are seen in the center of the cell
Each pronucleus contains 23 chromosomes
This embryo has 69 chromosomes instead of the normal 46
Zona pellucida (shell) is visible as a halo around periphery
Sperm are visible at 1 and 8 o'clock - outside of the zona

A normal one-cell embryo for comparison
2 pronuclei are seen
A polar body is at one o'clock
The upper pronucleus contains maternal DNA
The lower pronucleus contains paternal DNA

Fertilized IVF eggs with extra pronuclei
The top 2 and bottom right embryos in this picture show extra pronuclei
The 2 zygotes at the top also have vacuoles (extra structures that look like moon craters)

More IVF Embryo Images