Hi! I'll bet YOUR husband is a happy clam! First Response and Clear Blue tests supposedly turn positive up to 4-5 days BEFORE the missed period. Most other tests turn around the time of the missed period or within a week thereafter.
Don't be disappointed if it doesn't happen on the first try--it can take up to a year for a healthy couple to conceive.
Good Luck!
Dr B
Around the time that your period is due. Maybe a couple of days before or a couple of days after.