The female hairline is concave, while the male hairline is convex. Note a few problems with this hairline. 1- it is concave and rounded so that there are no temple peaks, something that 95% of men do not have, 2- the hair grafts at the hairline can be seen because there are many hairs in these leading-edge hairline grafts, and there is no transition layer producing a gradual evolution from the forehead to a thick hairline, 3- the hair density was low-balled for the frontal hairline. There are not enough grafts placed for adequate density (this is lucky for him if he wants them removed in a good repair process), and 4- single hair should have been placed on the leading edge of the frontal hairline. Fixing this can be a problem as the female-placed hairs would have to be removed with FUE, and the entire hairline would have to be reshaped into a normal convex male hairline. This is certainly not a bargain!