I admit it must seem as if the other 3 were complete flukes but my cycle has changed a little over the years and am now wondering if I'll be able to tell when is the best time to dtd.
I used to have a very light day, then nothing and one the third day my period would start.
28 days between light start date to light start date
28 days between heavy start date to heavy start date
I regarded myself as possibly fertile 11 days after light start to about 17 days.
However my last few periods have been light start on day 1 and nothing until day 7.
When is my possible fertile time??
Any advise appreciated