Ranma 1/2 is the only anime person that can asexually reproduce

Think about it: Ranma can change in man form, jizz in a cup, change into female form, pour the jizz down her snatch, stay in that form for several months, let pregnancy take its course, and finally have a baby using his/her own sperm & egg. It's a brilliant step forward in science

Prety sure Takahashi said female ranma cannot get preggo

That's a scary concept....

The sperm would have to be stored properly for it to work.