Most kids when they r younger, n mummy expecting again, they will know even without u telling them... I work in childcare for many yrs n had seen alot of cases, the child some turn frm bad to worse so for the better, recently my class got 2 new toddlers n their mummy is delivery soon. Everyday they come to school, onli want me to carry them n not my partner teacher, I think they can sense tat I m just like their mummy, tummy growing big...