What it is
Fertility naturally declines with age, but ovulation quality, luteal phase adequacy, thyroid status, and nutrient stores all influence outcomes and can be assessed.
What's causing it
Diminished ovarian reserve
Measured with AMH and antral follicle count — a quantity marker, not a verdict.
Luteal phase deficiency
Low progesterone after ovulation can prevent implantation from holding.
Thyroid and prolactin issues
Both commonly interrupt ovulation and are easily tested.
Methylation and nutrient status
MTHFR variants, low folate, B12, vitamin D, and iron all affect conception.
Nutrients commonly involved
What actually helps
- AMH and full hormone testing to get real data instead of guesswork
- Progesterone support in the luteal phase where indicated
- Methylated prenatal nutrition, especially with MTHFR variants
- Thyroid optimization before and during conception attempts
Questions women ask about this
What is AMH and what does it tell me about fertility?
AMH (anti-Müllerian hormone) estimates how many eggs remain — your ovarian reserve. It indicates quantity rather than quality, so it is one input among several, alongside thyroid, progesterone, and nutrient status.
Read more about this
More cycle & fertility symptoms
This page is educational and is not a substitute for individual medical advice, diagnosis, or treatment. Symptoms can have multiple causes — proper testing and a licensed clinician's review come first.