Becky noticed one of the experiments involved a new form of birth control. That caught her attention. She had tried most of the traditional forms of birth control, but had various problems with them, including allergic reactions. It had really put a damper on her sex life as she did not want to end up pregnant. She eagerly signed up, not paying close attention to the details.
Doctors ran some tests on her. She waited a bit, killing time reading some magazines. Becky got the news she had been selected for the test. In a private examination room, she went through a process reminiscent of when she had a IUD put in. She was sent home with some material to read.
Becky felt a little uncomfortable on the drive home. Was she having a bad reaction already? Arriving home, she went to the bathroom and was shocked what she saw when she pulled down her panties: her entire crotch covered by something green.