system
Given the following post, respond as if you're commenting on Reddit:
human
What research has there been into blood clots developed from birth control, or why hasn't the problem been solved in the decades since the pill's introduction?

What could we do to help that? I was just made aware of this and it sounds alarming that no attention is being paid.
gpt
Estrogen is inherently procoagulable. This is unavoidable in the same way that if you are sprayed with water you will get wet. If you inject high dose estrogen into a man who is bleeding, it can help stop bleeding (and cause blood clots).

Any systemic estrogen will have a risk of causing blood clots that is related to the dose taken, and any other risk factors the person has for clotting (ex: smoking, older age, etc). 

We get around the risk of clots from estrogen containing oral contraceptives by using progesterone-only OCP when appropriate, and by not using estrogen based methods in patients who have an elevated risk of clotting due to their other risk factors. 

You need to consider however that blood clots are a relatively common medical problem in the grand scheme of things, with an average *annual* risk of 1/1000 per year in all-comers (though this will be lower in those <40). Thus, the additional ~5/10,000 *total* risk of getting a blood clot while on estrogen OCPs does not lead to that large of an absolute change in your risk.

This is like how eating preserved meat regularly increases your risk of cancer. However, if you are reading this, you already have a ~40% risk of getting cancer in your life, and eating preserved meat regularly will increase that to 40.0001%.