Terms Related to Fertilized Egg

• Identical Twin

  Two offspring developed from one fertilized ovum.

• Ectopic Pregnancy

  Development of the fertilized ovum outside of the uterine cavity. (Dorland, 27th ed)

• Ovum Cleavage Stage

  The embryo in its earliest stage, lasting from the first mitotic division of the fertilized ovum into two blastomeres to the formation of the morula, …

• Morula

  The early embryo at the developmental stage in which the blastomeres, resulting from repeated mitotic divisions of the fertilized ovum, form a compact mass.