Signs for "female" and/or "woman" in various symbol systems.
Top row: Venus sign, toilet pictogram, modern Chinese character 女, ancient form of Chinese character (apparent abstract drawing of kneeling woman).
Bottom row: Ancient Egyptian hieroglyph ("B1" in Gardiner's sign list), late (1st millennium B.C.) form of Cuneiform sign, early Sumerian Cuneiform (abstract drawing of pubic triangle). 
The three symbols at the left of the top row are the ones in active current use (with many slight visual variations of each).
This vector image includes elements that have been taken or adapted from this file:
AnonMoos, based on fonts and PD images