Don't understand as now day 43 and still no sign of AF. Think I ovulated at day 32 which is really late. This follows our 3rd IVF attempt that failed. Now started synarel 5 days ago. Previous cycles have been antagonist but now trying the synarel for the first time. No major side effects yet but don't like the taste in back of mouth from it. Also think its making it hard to lose weight. Wondering how long to wait before concerned?