This question https://stackoverflow.com/questions/16879159/excel-2007-stacked-column-chart-display-subvalues is perfectly suited for SuperUser. I flagged it to be migrated to SU but now I find it has been closed instead as "too localized".
Never mind the "pregnancy" related data sample. The question is about splitting a column in a stacked column chart to display its sub-groups. Why is that too localised? It is not. It just off-topic for SO and better suited at SU.
Closing the question as too localized does not help the OP and it does not do much to invite more expert opinions on how to solve a very valid question about charting techniques in Excel.
Please re-open the question and migrate it to SU, which will greatly help the OP and others.