I don't know about the Merina, but I had rather painful cramping for two or three days, and then for about a month afterward whenever I had sex I'd cramp. I'd guess the effects would be about the same for both IUD's, as one's body is just getting used to having an extra thing all up in it's buisness
Yay for the IUD! It's what I'm thankful for this holiday season!
__________________
Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi