Thank you for your query.
I understand your concern. No one can change the chromosomal profile which you are going to transfer to your child. However you can do the following:
1. Have a well balanced normal diet with adequate vitamin supplements.
2. Get a chromosomal analysis of the fetus done during pregnancy
. This will be under the guidance of the obstetrician at the appropriate period of gestation. If any anomaly is suspected the doctor will give you various options.
I hope I have answered your query to your satisfaction.
Wishing you all the best.