How do you feel about choosing gender of baby during ivf treatment?

I am quite on the fence on this issue. On one hand, I feel that there is something "unnatural" about this supposedly natural process. On the other, I've known of parents who tried for years for a specific gender and ended up with more children than they've planned. For now, gender selection via Preimplantation Genetic Diagnosis (PGD) is banned in Singapore, unless it is considered necessary for screening genetic diseases such as Down, Edwards and Turner syndromes. I guess another point I will ponder upon would be what happens if for that round of IVF, of the healthy embryos are not of the gender of choice. How will the couple decide then?