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. 2018 Jun 13;48(11):3773–3782. doi: 10.1007/s10803-018-3626-6

Table 1.

Alcohol categories in pregnancy as defined in the MCS

None: subdivided into (a) Never drinks alcohol (teetotal)
(b) Drink alcohol but not during pregnancy
Light Not more than 1–2 units per week or at any one time in pregnancy
Moderate Not more than 3–6 units per week or 3–5 units at any one time in pregnancy
Heavy 7 or more units per week or 6 or more units at any one time in pregnancy