IUD

A reader writes:

We already invented a better birth control.  It's called the IUD.  It's almost perfect, with minimal side effects after implantation (although that can hurt quite a bit), and almost 100% efficacy, with no possibility for user error.  It falls short of perfection only because of the minute possibility of expulsion.

Another writes:

I thought it was common knowledge that pharma doesn’t invest in new contraceptive technology because fear of lawsuits. Remember the Dalkon shield?

From Wiki:

The Dalkon Shield was a contraceptive intrauterine device (IUD) developed by the Dalkon Corporation and marketed by the A.H. Robins Company. The Dalkon Shield was found to cause severe injury to a disproportionately large percentage of its users, which eventually led to numerous lawsuits in which juries awarded millions of dollars in compensatory and punitive damages. … More than 300,000 lawsuits were filed against the A.H. Robins Company – the largest tort liability case since asbestos, and the federal judge, Miles W. Lord, made history with the judgments, personal liabilities and public rebukes of the company heads.