Crucial Development: Your Baby in the Fifth Week of Pregnancy
- Baby size 0.3 cm
- About the size of a sesame seed
By the fifth week of pregnancy, your baby has reached a considerably larger size and the first defined structures are forming. The neural tube, which will become the brain and spinal cord, is already present, and the heart begins to beat in a rudimentary way. The sprouts of the extremities also appear, which will become the arms and legs. This is an exciting time where the fundamentals of physical development are taking shape, preparing for more complex growth in the coming weeks.