There is no harm to babies if you eat litchi during pregnancy. However it is a sweet fruit and very high in sugar. This can lead to weight gain of consumed in excess and if you have gestational diabetes then it should be avoided.

there was an article about litchi being harmful for babies... so better not to have <font color ="#3b5998"><b><a href="http://app.babychakra.com/article/1692">Litchi Behind Mystery Illness in Kids </a></b></font>