Even modern couples want to find the gender of the to-be-born child. Sounds ridiculous? You can't guess why, unless you think "out-of-the-box".
[Spoiler alert] Take your time to guess before reading further.
I too was surprised when I heard. But here's why...
Couples these days want to know the gender of to-be-born child for various different reasons (apart from the usual ones one may think of, in disgust).
1. What color toys, clothes etc., to buy? It would be blue if it's a boy and pink if it's a girl.
2. It is time to admit first baby girl into a school and they would like to know what gender second child is going to be. They would go for co-ed if it's a boy and girls school if it's a girl.
3. To decide the time of birth, if given a choice (like in case of c-section). Some days are auspicious for baby boy and some are auspicious for baby girls.
The third one sounds weird as it tries to decide the fate of new born ;-), but which one does not?