I would say that you need to treat it as if you were trying to get pregnant. Elevate your hips for about 10 - 20 minutes to allow the sperm to get where they need to be, then use the restroom.
i have more of a question then a comment....i am 36 weeks an 4 days...after sex is it safe to urinate or will that hurt the chances of the semen softening my cervixs?????
i am 3 cm dialated an only 50% efaced....
Your cervix can remain soft for weeks before you go into labor or it could soften right before labor - there is no way to know what applies in yous situation.