Can but in moderation.
Coke contains caffeine. Caffeine should be reduce and limited during pregnancy, but coke's caffeine content is actually lower than one cup of coffee so shouldn't be an issue. Pregnant women are advised to keep to max one cup of coffee a day (single shot).
If already drink coke, then don't drink coffee, tea or chocolate loh..
I still drink coffee, coke or tea once every few days. I understand that cravings for cold soft drinks that soothes the morning sickness tongue.

Your bigger concern should be the sugar amount in Coke. If she has sign of gestational diabetes, better avoid.

This post has been edited by lowlowc: Oct 15 2018, 03:10 PM