How many women smoked throughout their pregnancy?

Women who smoked before finding out they were pregnant, did you stop immediatly, stop part way through or smoke throughout? For those who didn't quit immediatly, were there any side effects? I know the statistic but wanted to see what this community had to say. My best friend doesnt think its a probelm to smoke throught pregnancy and around baby after they're born cos her Mom did it and had three healthy kids. Which made me curious and I thought Id ask. 🤔

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