They are similar a bit like this ----
It is true that the testicles are similar in shape to ovaries, but that is where those similarities end. Males do NOT start as females. All humans start out the same, asexual. When hormones are introduced during development, the s-xual organs form. If a female has too high of testosterone during development, they will be come a hermaphrodite and have what looks like both organs and same goes if males and they actually begin life as the same organ structurally anyway. That's why it's so difficult to tell the sex of a very young fetus they all have a phallus which becomes a pen-s in males and a cli-oris in females. The gonads are all internal at that time. They become ovaries in females and descend and become testicles in males.
