Being quite familiar with China, I second this. I don't know about India, but in China it was the combination of a cultural necessity to have a son and the one

Being quite familiar with China, I second this. I don't know about India, but in China it was the combination of a cultural necessity to have a son and the one the child policy that lead to the current gender imbalance. In the bad-old-days, many girl babies were simply discarded and often died. The problem cannot be blamed on ultrasound tech.