You've always been able to choose the sex of your own baby.
Infanticide is a common practise in MANY countries.
I know in China and India female children are aborted and abandoned on a regular basis. Hell, they even have ultrasound/abortion packages. After the procedure the mother demands that the doctor show her the aborted fetus to insure that a male child was not mistakenly aborted.
I am certain this goes on in many parts of the world where those societies are set up to value the lives of female children far less than those of males.