The swing is enormous
Across a single cycle, oestradiol can move several-fold and FSH moves inversely to it. In perimenopause the swings get wider, not narrower. A draw taken in a high-oestrogen week produces false reassurance; a draw in a low week produces a false alarm and sometimes a prescription that was not needed.
When each marker is worth drawing
If you are still cycling, FSH, LH and oestradiol are read in the early follicular window — roughly days two to five — and progesterone about a week after ovulation, where it confirms whether you ovulated at all. AMH is the exception: it is broadly stable across the cycle, which is why it is the one ovarian-reserve marker that can be drawn almost any day.
And if you are on hormonal contraception
Combined hormonal contraception suppresses FSH, LH and your own oestradiol, and lowers AMH somewhat. A panel drawn on the pill does not describe your underlying state, and it cannot be used to stage the transition. Your physician needs to know what you are taking before the result means anything — which is why the intake asks.
Key points
- FSH, LH and oestradiol: early follicular. Progesterone: mid-luteal.
- AMH is the one that can be drawn almost any day.
- On hormonal contraception the panel describes the pill, not you.
AZZA Medical is not a medical provider and does not practice medicine. Medical services are provided exclusively by independently licensed physicians of our partner physician network and their affiliated professional entities.
Compounded drugs are not FDA-approved and have not been evaluated by FDA for safety or effectiveness.
This is not emergency care. AZZA Medical does not provide urgent or emergency medical services. If you are experiencing a medical emergency, call 911 or go to your nearest emergency room.