An Embryologist View Through the Microscope
Under the Microscope
Fertilized Oocyte
Image through a microscope of a normally fertilized embryo……the day
after retrieval of the oocyte and insemination with sperm, the embryo
consists of two pronuclei, one from the male spermatozoa and a second
from the female oocyte.
Day 3 embryo
Image through the microscope of a Day 3 embryo…..Normally dividing embryos
contain from 4-8 blastomeres or cells on the third day of cleavage.
Day 5 Blastocyst
Image through a microscope of a Day 5 Blastocyst…..the blastocyst contains greater than 100 cells that are formed
into 2 distinct types, the inner cell mass that goes on to make the fetus and
the surface cells called the trophectoderm that goes on to make the placenta.
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