This is a slight variation of a neural tube defect known as iniencephaly in which there is lack of proper formation of occipital bones with a short neck and defect of the upper cord. The head is tilted back. The most common outcome of this condition is a stillbirth, although rarely live births do occur. In these rare cases the infants invariably die after a short period of time (typically only a couple of hours).
I say this because I don't want bad advice out in the world, but being strictly vegan while pregnant is a bad idea, especially for your baby. You need to take supplements for vitamin B12, calcium, iron, folic acid, and protein. You can get calcium from kale and protein from nuts and/or soy, but it's likely to not be enough. Also, you just shouldn't consume soy while pregnant. It messes with hormones, especially for males.