How to dissolve a marriage if we have a one-year-old child and the woman is pregnant?

According to Part 2 of Article 110 of the Family Code of Ukraine, a lawsuit for divorce cannot be filed during the wife's pregnancy and within one year after the birth of the child, except in cases where one of the spouses has committed illegal behavior that contains signs of a criminal offense, in relation to the second of spouse or child.

So you have to wait.