If I remember correctly the situation in Uganda was, at the least, promoted by direct intervention from influential outside agencies - ie American fundamentalists

However, as Paul points out

"The phenomenon of female infanticide is as old as many cultures, and has likely accounted for millions of gender-selective deaths throughout history.

It remains a critical concern in a number of "Third World" countries today, notably the two most populous countries on earth, China and India.

In all cases, specifically female infanticide reflects the low status accorded to women in most parts of the world; it is arguably the most brutal and destructive manifestation of the anti-female bias that pervades "patriarchal" societies.
It is closely linked to the phenomena of sex-selective abortion, which targets female fetuses almost exclusively, and neglect of girl children."

The bias against females in India is related to the fact that "Sons are called upon to provide the income; they are the ones who do most of the work in the fields. In this way sons are looked to as a type of insurance.
With this perspective, it becomes clearer that the high value given to males decreases the value given to females." (Marina Porras, "Female Infanticide and Foeticide".)

The problem is also intimately tied to the institution of dowry, in which the family of a prospective bride must pay enormous sums of money to the family in which the woman will live after marriage. Though formally outlawed, the institution is still described as 'pervasive'.

Some Indian state governments have taken measures to diminish the slaughter of infant girls and abortions of female fetuses

"The leaders of Tamil Nadu are holding out a tempting carrot to couples in the state with one or two daughters and no sons: if one parent undergoes sterilization, the government will give the family [U.S.] \\$160 in aid per child. The money will be paid in instalments as the girl goes through school. She will also get a small gold ring and on her 20th birthday, a lump sum of $650 to serve as her dowry or defray the expenses of higher education. Four thousand families enrolled in the first year," with 6,000 to 8,000 expected to join annually (as of 1994) (Dahlburg, "Where killing baby girls 'is no big sin'.")

To echo Paul's query .......

What would you propose to do about it?