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The two most important tests during treatment for conception are HSG( hysterosalphingography) to see that the tubes are patent & follicular study
in females & semen analysis
in males .If these reports are done & they are normal then the chances of conception are good.If you have a menstrual cycle of 28 days then you will have to start monitoring from 9th day itself & cannot wait till 11th day;the reason is that if the follicle has matured above 20mm around 11 th day you will not be able to take HCG
shot which is probably necessary in your case.