If discrimination is the main problem here, as the Prime Minister suggests, a simple solution would be to advocate for more male abortions. The tactic that they have chosen has been to make it illegal for medical personnel to tell a parent (a term the article uses) the sex of their child.
“No nation, no society, no community can hold its head high and claim to be part of the civilized world if it condones the practice of discriminating against one half of humanity represented by women,” Mr. Singh said, giving an inaugural speech at a national conference dedicating to “saving the girl child,” which brought together politicians, doctors and advocates.
In other words, having an abortion without knowing the sex of the child you are electively killing is a legal, sanctioned right. Telling a couple the sex of their child is punishable by up to 5 years in prison. Aborting a female child for economic reasons is described as "this terrible onslaught on our civilization."
By fully embracing population control policies that resulted in abortion being seen as an acceptable and even encouraged means to control population, India set the stage for this situation. Now, since it can not backtrack from this failed policy, and see abortion as the wrong that it is, it is stuck with this situation.