@lastbany below is copied from a Facebook group I’m a part of. Not sure where they got the information from though!!
Could the blood be ovulation related?
^We get a lot of posts about the best time to take your meds. Here is a list of what different days can accomplish. I don't have a source for this, so take it or leave it. 💜 ALWAYS follow your Doctors instructions.
1-5 = you produce more eggs, and ovulate sooner, with a stronger ovulation.
2-6 = you produce more eggs that usual, but not as many as taking it 1-5. Eggs may be more mature, and ovulation will be slightly more strong than 1-5.
3-7 = The best of both worlds, a few more eggs, and all eggs will be strong & mature, and ovulation will be alot stronger than 1-5.
4-8 = No more eggs will be produced, but the ones already there, will be matured alot more than usual, and ovulation will be very strong. Ovulation may only be brought forward a teeny bit.
5-9 = You'll have one very mature strong egg, from the ones you already produced on your own. Ovulation will either happen when it usually does, or a few days later, but your egg will be of great quality.^