Motherhood is tricky, no matter what anyone tells you, you can never be fully prepared. Your body grows in pregnancy, and you feel different. Furthermore, there are a variety of hormones that are released that help in the development of the baby. This may make the mother feel nauseated or increase their craving. However, there is also one more thing that can happen during pregnancy. Transmission of diseases. Some infections in mothers can pass on to babies during pregnancy, delivery or even while breastfeeding. Know which ones are they:HIVIt is human immunodeficiency virus that attacks cells that help the body fight infections and makes the person vulnerable to diseases. The virus can be transmitted through contact with infected blood, semen or vaginal fluids. HIV can be transferred to the baby during birth or even while breast feeding, notes the Centers for Disease Control and Prevention (CDC). The risk of transmission is highest in the early months of breastfeeding and the rate is estimated to be at least 16%, and prolonged breastfeeding nearly doubles the chances. Hepatitis BAlso known as HBV is a viral infection that, as per the World Health Organization (WHO) causes live infection and can lead to short term or chronic disease. It can be spread by exposure to infected bodily fluids. It can be passed on to the child at birth, however to prevent this, the babies can receive the HBIG/HBV vaccines at birth. CDC also mentions that the risk of HBV mother-to-child transmission through breastfeeding is negligible if the vaccine is received. SyphilisAs per WHO, it is a preventable and curable bacterial sexually transmitted infection that can cause serious health issues if it is left untreated. Many people with syphilis do not have any symptoms, or do not notice them. It can be transmitted during oral, vaginal, and anal sex, in pregnancy and through blood transfusion. Cytomegalovirus (CMV)CDC notes that this is the most common infectious cause of birth effects in the United States and can spread through body fluids like saliva and urine. It is a genus of viruses in the order Herpesvirales, in the family of Herpesviridae. Zika VirusAs per WHO, Zika virus infection during pregnancy can cause infants to be born with microcephaly and other congenital malformations as well as preterm birth and miscarriage. It is a mosquito-borne virus that can cause serious birth defects, notes the CDC. ToxoplasmosisToxoplasmosis is an infection with a parasite called Toxoplasma gondii, which can be found in uncooked meat. This can also be contacted by cat feces and the parasite can be passed down to a baby during pregnancy.