Clomiphene + Metformin

Meron na po ba ditong niresetahan ng OB ng Clomiphine at Metformin na nagkatwins? Isa daw po kasi yung multiple birth sa side effects ng fertility drugs? Or anyone na naging pregnant with these drugs? Naka 2 cycles na po kasi ako, and waiting now if successful yung pangalawa (PCOS po ako pero with regular menstruation) salamat po sa sasagot.