How Women Can Improve Their Fertility & Hormone Health | Dr. Natalie Crawford

KEYPOINTS

• 01

  Fertility is a whole-body health marker

  Crawford, a reproductive endocrinologist who has been through infertility herself, notes that ovulation, fertilization and implantation require many systems to work. Infertility is associated with higher rates of metabolic syndrome, cancer, heart attack, stroke and early death. That's not because infertility causes them, but because it's often an early warning sign of chronic inflammation or insulin resistance.

• 02

  Egg quantity and egg quality are different things

  Quality means genetic normalcy and competence, such as healthy mitochondria. There's no direct test, so doctors approximate it by age, though 'not all 40-year-olds are created equal', and worsening metabolic health adds to age-related genetic errors. Quantity (ovarian reserve) can be estimated with a simple blood test for anti-Müllerian hormone (AMH), made by granulosa cells around each follicle.

• 03

  Crawford thinks every woman who may want children should get an AMH test

  She acknowledges this goes against the American College of Obstetricians and Gynecologists, which advises testing only for infertility because a low result is stressful and doesn't predict natural conception that month. True, she says, but a low AMH means a shorter timeline, fewer eggs for freezing or IVF, and earlier menopause. Its causes, including autoimmune disease, insulin resistance, endometriosis and smoking, can themselves cause infertility. In about half of low-AMH cases, she says, an investigation finds a cause. Birth control, pregnancy or postpartum can temporarily suppress AMH.

• 04

  Tracking ovulation beats tracking periods

  Regular bleeding is good, but knowing when you ovulate reveals the length of your follicular and luteal phases. Ovulation disorders progress predictably. The first stage is a luteal phase defect, with progesterone lasting fewer than 11 days, which can occur even with regular cycles.

• 05

  The fertile window is narrow

  Sperm can live up to five days in the reproductive tract, though most last about two. Intercourse in the two days before ovulation and on the day itself carries roughly a 20–30% chance of pregnancy per cycle; the day after ovulation is essentially zero. Timing intercourse to detected ovulation shortens time to pregnancy.

• 06

  NSAIDs around ovulation can block egg release

  Ovulation is an acute inflammatory event: the follicle has to rupture. Ibuprofen or naproxen near ovulation can let the hormonal changes happen without the egg being released. Crawford tells patients trying to conceive to use these only during their period. The goal is to lower chronic inflammation, not switch off the immune system, which ovulation and implantation need.

• 07

  Five non-negotiables: sleep, stress, muscle, food, toxins

  Crawford rejects the idea that fertility is all luck. Even though you can't control everything, metabolic and cellular health are highly modifiable for both partners. Earlier attention to inflammation, such as treating endometriosis, diagnosing Hashimoto's early or managing autoimmune disease, may also help extend ovarian lifespan. Women with premature ovarian insufficiency show more ovarian inflammation and fibrosis.

• 08

  Sleep directly shapes reproductive hormones

  FSH and LH are released in the early morning hours. Short sleep is linked to lower testosterone and sperm counts in men, fewer eggs retrieved at IVF in women, and roughly double the rate of infertility when people report poor sleep. Crawford recommends 7–9 hours (closer to 7.5 for most women, especially in the luteal phase), with consistent timing shared with your partner.

• 09

  Egg freezing is an investment, not an insurance policy

  Stimulating extra eggs that would otherwise be lost each month lets doctors bank them, and Crawford says it doesn't cause early menopause. Insurance always pays out, whereas frozen eggs are more like a stock-market investment: likely to pay off, but not guaranteed.