Oestrogenic side effects:
- Bloating
- Breast swelling and tenderness
- Nausea
- Headaches and migraines
- Leg cramps and DVT
- Melasma
- Increased risk of breast and uterine cancer
Progestogenic side effects:
- Bloating
- Weight gain
- Mood swings
- Fluid retention
- Acne and greasy skin
- Decreased libido
- Decreased bone mineral density
Note that progestins can cause breast tenderness.