What does XY means in pregnancy scan?

Related questions

1. Why do they call a man's zipper a fly?
2. Why do men's pants have zippers?
3. Why do dress pants have 3 buttons?
4. What is a French fly?
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6. Is XYZ a domain?
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Tags

1. #condition
2. #genetically
3. #working
4. #chromosome
5. #carry
6. #female
7. #children
8. #individuals
9. #there
10. #known
11. #females