[4][5] In April 2016, Petrík was prohibited to enter parliamentary chambers by Deputy Speaker Béla Bugár, due to the fact that she had her six-month old daughter with her.

Petrik filed a complaint with the Constitutional Court of Slovakia about discrimination around a law regulating private crèches (nursery schools).

[7] She also pointed out the unconstitutionality of extra fees charged by the hospital for childbirth, including choosing your own obstetrician, Epidurals, and the presence of the father in the delivery room.

[9] Together with her independent parliamentary colleagues Miroslav Beblavý, Jozef Mihál, Katarína Macháčková, Viera Dubačová and Oto Žarnay, Petrik founded the party Democrats in April 2017.

[11] In July 2017, News Agency of the Slovak Republic reported that Petrik was one of the "most curious" members of parliament, having asked 57 questions of the government.