Answer
For sitagliptin, the sitagliptin component of metformin + sitagliptin (Janumet), animal data do not suggest an effect on male or female fertility, but human data are lacking.
Sources for this answer
- Janumet 50 mg/1000 mg film-coated tabletsMerck Sharp & Dohme (UK) Limited · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 26Document updated
Sources checked