The quad test basically looks at various genetic diseases or anomalies such as Downs, Spinabifida and stuff like that. Midwife measured me at 20 weeks instead of 18, but we're keeping our EDD just for now. I'm not a big drinker. I'm fairly certain I had a drink or two once my levels hit 0. Once we were good to start TTC again I cut out all alcohol and unhealthy goods, just to boost my chances.