I think it's horrible that anyone would choose an abortion over having a daughter, but at the same time I can't help but wonder what life would be like for the daughters who are born but not wanted.  Simply banning doctors from sharing the gender of the child won't solve the problem because the problem isn't the abortions themselves;  the problem is that females are undervalued in some cultures.  In many places unwanted girls have been killed, abandoned or at the very least neglected.  Some of those problems are lessened when people can select the gender of their child, and I suspect that there would be a rise in female infanticide, abandonment and neglect if abortion were no longer and option for people who don't want to have a daughter.  The only long term solution to the problem is to work on valuing girls as much as boys, and sadly it isn't an easy change to make. 

Then, which is the bigger issue?  I submit that skewing the population toward boys is the greater issue here.  It will lead to ethnic populations where 12 boys "compete" for 10 girls (for example), which leaves 2 boys very depressed and angry and prone to violence.

Education and a continuing decline in religiousity and the influence of religion and religious leaders.  The religions of new Canadians will see a decline as well - they're just decades behind on the same curve.

It may take a generation or two to change these attitudes and beliefs, just as it's taken a couple of generations to see a major decline in Christianity in Canada.

It's an issue within certain ethnicities, often with a religious component.  And it's going to take generations to change, just like other societal shifts, like same sex marriage.  And just like with same sex marriage, there will be people and religious leaders sho see no problem with preferring a boy over a girl, to the point of shaming the wife who is not producing a boy, and rewarding the wife who does.

There are, of course, reasons people prefer boys, such as the payment of a dowry to the family of the groom by the family of the bride, and those you mention.  These traditions have to stop.  Marriage is the combining of equals, and if you think that the groom and the groom's family deserve gifts and care into old age, while the bride's parents must give the gifts and/or be ignored and abandoned, then whatever tradition or religion you are following is hopelessly broken and you don't belong in the modern world.

We need to release women from being treated like, and thinking of themselves as, posessions.  We need to educate women and get them in positions of leadership.  We need to stop thinking of them as breeders and give them the choice of when or if to have children (contraception), which certainly is against the wishes of certain religions, who erroneously feel they have rights over a woman's reproductive system.

So yes, there is a religious component to this problem, and like other backward religious beliefs or practices, it will probably only be fixed through education and the passage of time.

This infanticide will backlash and already is in some places, as there are a lot of 'spare' bachelors around and a shortage of females to marry. This creates a whole new set of problems.

I didn't want to know ahead of time whether my baby would be a boy or a girl.  I don't see any worthwhile advantage to it, at all.  A little dose of wait and see has been adequate for millions of years!

It isn't religious, it is cultural.  Sokme cultures simply value males over females.

Time will help change that , at least in North America.

I don't think banning telling sex of a fetus will help and will be impossible to police.