I've wondered this for a while. Been TTC for 8 months now with no success.
I had my implant removed earlier this year and after 6 weeks my periods returned. They are very regular for 6 months I had 28 day cycles and the last 2 months 29 day cycles.
However, since the implant removal (I had no periods with the implant) my periods have been extremely heavy, to the point I need to wear two pads and to change them every 1-2 hours. (TMI) There are also a lot of bright red clumps, some quite large. This lasts about 2.5 days, then the next 2.5 days are normal medium to light period.
I have 2 other DC conceived over 7 years ago, both conceived within the first month but with a different partner. My periods back then were regular but not heavy.
Is it normal to bleed so much? Could it somehow be affecting my chances of conceiving? According to OPKs I ovulate around day 15.