When did your baby first call you mama?

My 16 month old is just starting to pick up a couple of words here and there, but I'll be damned - she does NOT say mama! She said her first word 'dada' at 12 months in the right context, pointing to her dad. Since then she's said Thatha (granddad in our language), up (pointing up when she says it, to be lifted up), apple, and now it feels like she's saying 'bathroom' (she loves bathtime). Still no mama!!!! At this stage I feel like she's going to say the entire english language before she says mum.

When did your baby first say it?