Chromosome Issues.

Chromosomes hold genes. In a developing fetus, one set of chromosomes is contributed by the mother and another by the father.

Examples of these chromosome abnormalities include:

• Intrauterine fetal demise: The embryo forms but stops developing before you see or feel symptoms of pregnancy loss.
• Blighted ovum: No embryo forms at all.
• Molar pregnancy: Both sets of chromosomes come from the father, no fetal development occurs.
• Partial molar pregnancy: The mother’s chromosomes remain, but the father has also provided two sets of chromosomes.