input: [1] Male has mated repeatedly with female(s) but after at least 90 days there are no signs of pregnancy or pups. [2] Reproductive failure [3] Can be triggered by excess vitamin C supplementation in the male's diet63 , sperm degeneration in old age or a congenital abnormality. [4] Ensure the correct dosage of vitamin C is calculated prior to supplementation. If in doubt, feed a ready-supplemented guinea pig food. Avoid supplementing drinking water where dosage is hard to quantify. [5] GOOD [0] 
output: Reproductive tract