Supposedly, they do, if you can believe what you read online. The contracting of the uterus is supposed to help implant. We always give it a go but hmm maybe that's not a great sign.
I have always thought it was catapult the egg out of the uterus before it had a chance to implant! I know it sounds silly but my mind thinks it sounds totally logical.
it can still help post IUI Leash - DH and i were told to make sure i O'd cos the contraction of the uterus helps the swimmers get up to the tubes rather than just in the uterus where it's deposited.
i don't know if it's aids implantation, but we were told just to do whatever we normally do. if you're not doing IUI in a hetero relationship, you wouldn't know exact timing, so you wouldn't avoid DTD in the implantation window (which is generally 6-10 dpo, can be as late as 12 dpo though) - so i don't see how it could harm anything. the contractions of the uterus won't push anything out though, i promise!
you have to picture the uterus like two pieces of buttered bread smooshed together - nothing is going to catapult anything out of there!
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