It can be difficult to detect pregnancy with PCOS , as it causes irregular periods and abnormal hormone levels. If you are taking a home-based pregnancy test, use it 2 – 3 weeks after sexual intercourse to see if you are pregnant. You can also look out for the usual signs of pregnancy including: Bloating Backache Breast tenderness Frequent urination Fatigue and tiredness Higher basal temperature Nausea or food aversion To confirm your pregnancy, visit your gynaecologist for a blood test.