Thanks for the query.
The presence of spider veins on breast and purple nipples per se alone cannot be termed as signs of a pregnancy, unless pregnancy has been prior confirmed by a urine pregnancy test or a serum beta hCG test. A similar presentation can also be seen in cases of thin skin or lesser subcutaneous fat women where the veins can be seen under the skin in fairer skinned women.
I hope I have answered your query in detail.
Wishing you good health.
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