Actually, he and she are equal in Persian. When you say "ou" we don't understand if you speak about a man or a woman. You can say "an khanoum" translated "that woman" or "an mard" translated "that man" and thus, we will find that which is which. Also, it is useful to know that "an" is almost formal and we usually use "oon" instead of "an" I think that it is easier for us to pronounce. "oon" is like /u:n/. You should aware that we don't use English alphabet to write Persian so I am not sure about spelling. At last, it's not common, at least, for me to mention that someone is male or female. Good luck.