Cycle Day 3 Testing

A standard Day 3 panel includes FSH, LH, and estradiol, often with AMH added. A baseline ultrasound with antral follicle count is often scheduled the same day. Together, these give your doctor an early-cycle snapshot of your hormone levels and ovarian reserve.

If your period begins over the weekend, please call our main line at (203) 750-7400 first thing Monday morning for next steps.

There's some flexibility in the window, and Day 2 through Day 4 draws are generally acceptable, so a weekend start rarely means missing the cycle.

Note: "Day 1" refers to the first full-flow (bright red bleeding) day of your period. This marks the first official day of your menstrual cycle. Brown or pink spotting does not count as Day 1.

A high FSH result can feel unsettling to see, but it does not mean pregnancy is impossible. It simply suggests that conceiving may take a little more support, whether that's a different treatment approach or a more personalized protocol. 

Your doctor will look at your FSH level alongside estradiol, AMH, and antral follicle count to understand the full picture before making any recommendations.

What counts as "high" depends on your lab's reference range, so there's no universal cutoff. A result your doctor flags as elevated generally suggests the ovaries are requiring a stronger hormonal signal to stimulate egg development, which can point to diminished ovarian reserve.

It does not mean pregnancy is impossible, and your doctor will always look at the full picture, not this number alone, before recommending next steps.

Estradiol is the primary form of estrogen, produced mainly in the ovaries. It's responsible for the growth and health of your uterus, fallopian tubes, and vaginal lining, all tissue that needs to function well for a pregnancy to succeed.

On Day 3, it's checked alongside FSH because a high estradiol reading can mask a high FSH result, making it look normal when it isn't.

There's no single "normal" number, since reference ranges vary by lab and testing method.

In general, a lower Day 3 FSH suggests your body is signaling normally, while a higher result can point to diminished ovarian reserve. Your doctor interprets your specific result against the lab's ranges and alongside your estradiol, AMH, and antral follicle count.

No. Day 3 testing requires no fasting and no special preparation, and you can resume normal activities immediately after your blood draw.