I did at least 50 mg daily for well over six months before getting pg. I think it may have been closer to a year, I dropped back down after I didn't get pg after trying for a few months. I now believe it took me a bit longer to get pg because of the iud I had taken out. Anyway, my last pregnancy I took one and occas two drops Lugols
5% daily. some days I skipped it. During breastfeeding I bumped it up to close to 50 mg daily and felt great but got worrried after hearing about warthogs baby, so cut back to one or two drops again, and then up to about three drops daily while bf and in the early months of pregnancy. Currently almost 8 months pregnant and taking 0-3 drops daily, depends on what I feel that I should take, also I take more if my allergies flare.