Latent TB was probably diagnosed on the basis of Mantoux test / Quantiferon TB gold or another interferon gamma release assay (IGRA). The chances of latent TB becoming active depends on various factors and these variables cannot be accurately predicted or estimated. Some countries treat these cases not from the patient’s perspective but for public health reasons; however there are no universal guidelines. This should not affect your personal life in any way. This should not affect conception or pregnancy unless the fallopian tubes are involved. It is not hereditary. No special diet is required other than a nutritious well-balanced diet. Alcohol is not contra-indicated but is best avoided if she is thinking of conception.