Your baby resembles a tadpole more than a human, but is growing fast. The circulatory system is beginning to form, and the tiny heart will start to beat this week. Your baby is the size of a sesame seed. Read about your pregnancy at 5 weeks.
Stores of B12 can last for up to a year. Foods high in Vitamin B12 include shellfish, liver, fish, crab, fortified soy products (tofu, soymilk), fortified cereals, red meat, low fat dairy, cheese, and eggs.
How do you get enough vitamin B7 from foods? Most healthy individuals who are not pregnant get adequate amounts of biotin through the diet. Foods rich in biotin include organ meats, barley, brewerâs yeast, fortified cereals, corn, egg yolks, milk, royal jelly, soy, and wheat bran.