Stage transferred to uterus after induced fertilization of ova in the laboratory is

Options

A. Embryo at two - blastomere stage
B. Morula
C. Zygote
D. Embryo at four blastomere stage

Answer

To answer the question regarding the stage transferred to the uterus after induced fertilization of ova in the laboratory, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Fertilization**: When the male and female gametes (sperm and ovum) are fused together, they form a zygote. This is the initial stage of fertilization.

2. **Cell Division**: After the formation of the zygote, it undergoes several rounds of cell division (cleavage) to form a multicellular structure. This process continues until the zygote develops into a stage known as the morula.

3. **Identify the Morula Stage**: The morula is a solid ball of cells that typically contains 8 to 16 blastomeres (cells resulting from the division of the zygote). This stage is crucial as it indicates that the embryo has developed sufficiently for implantation.

4. **Transfer to the Uterus**: According to the protocols of assisted reproductive technology, if the embryo has 8 or more blastomeres (i.e., is in the morula stage), it is transferred directly to the uterus. If it has fewer than 8 blastomeres, it would be transferred to the fallopian tube instead.

5. **Conclusion**: Therefore, the correct answer to the question is that the stage transferred to the uterus after induced fertilization of ova in the laboratory is the **Morula**.

### Final Answer:
The stage transferred to the uterus after induced fertilization of ova in the laboratory is **Morula**.

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