the date is the date according to the lunar cycles (the moon) that you will be fertile.
if this date falls during your menses, or coincides with your expected ovulation, then there is an exceptionally high probablity of fertility.
this method supports the probablity that women can and sometimes do ovulate more than 1 time per cycle on occassions.
gender is the most likely sex of a child conceived at that time.
risk is to do with birth defects and so forth. it is rated from 0 to 6 (or at least 6 is the highest I've come across). the higher the number the greater the risk that a child conceived at that time will have abnormalities, birth defects (physical or mental) or simply that the pregnancy will not be viable/will miscarry