Dr. Leizl Yance, ND Book at FMU
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Naturopathic doctor in Kitchener-WaterlooYour body has a story to tell. Let’s look closer, together.

Hi, I’m Leizl, a naturopathic doctor with a clinical focus on fertility and hormonal health. Think of me as the friend you can ask anything (yes, anything), who also gets a little too excited about lab results. And I play nicely with your family doctor, midwife or fertility clinic.

Book a visit at FMUWhat’s a first visit like? →
Leizl smiling in a red cable-knit sweater, her dog resting its chin on the table beside her
Dr. Leizl Yance, ND

Areas of focus

What we can work on together.

Fertility

Trying to conceive

Just starting, a few months in, or in the middle of IVF or IUI. Wherever you are, you don’t have to figure it out alone.

 Hormonal health

Cycles and hormones

PCOS, endometriosis, PMS and PMDD, heavy or painful periods, thyroid and blood sugar. Your cycle has a lot to say.

 Pregnancy

Pregnancy and postpartum

Care through each trimester, including gestational diabetes, and care for you after the baby arrives.

How it works

Here’s how we’ll work together.

No pressure, and no question is too small (or too weird). It all starts with a good long chat.

  1. Your first visit75 minutes, all about you. We chat about your cycle, your history, your labs, food, sleep, stress and what you’d love to change. Come to the clinic in Waterloo, or hop on a video call from anywhere in Ontario.
  2. A plan, in writingNo need to remember everything we talked about. You get your plan written down: what we’re starting with, and why.
  3. Follow-upsWe check in on what’s working, tweak what isn’t, and I cheer you on toward your goals (and keep you accountable). If you’d like, I’ll loop in your family doctor or fertility clinic.
  4. Staying on trackOnce things feel good, regular check-ins help you keep it that way, through whatever life throws at you: a new job, trying to conceive, a new baby.
Book your first visitFees, coverage and what to bring →

Want to chat first? Book a free 15-minute intro call first.

Good questions

Questions I get asked a lot.

Fresh from the notebook

Fertility · 1 Oct 2026

When is the fertile window?

About six days: the five days before ovulation, plus ovulation day itself. Ovulation doesn’t happen on the same day for everyone, so those six days move around too.

All notes →

Hi, I’m Leizl

This is my story.

For years I lived with painful periods and difficult cycles. When I finally saw a naturopathic doctor myself, my body started to make sense: a connected system, where symptoms are signals waiting to be understood.

That’s still how I work. I listen to your whole story, explain things plainly and cheer you on along the way. Outside the clinic I’m usually on a trail or at the pottery wheel, with my dog close by (supervising, obviously).

Read more of my story →

Leizl’s dog, a brown and white herding dog, resting its chin on a wooden table
research assistant (unpaid)

Where to find me

In Uptown Waterloo, or on your screen.

In person

Functional Medicine Uptown

109 Erb St. W, Waterloo, ON N2L 1T4
(519) 745-1600

My hours in clinic

Monday 9 am – 12:30 pmWednesday 1 – 6 pmThursday 9 am – 12:30 pm

Directions
Virtual

Anywhere in Ontario

Video visits for people located in Ontario at the time of the visit. Handy if you’re in Kitchener, Cambridge or further afield. (Pyjama pants allowed.)

How virtual visits work

Come say hi.

Your first visit is 75 minutes, all about you. Come see me at Functional Medicine Uptown in Waterloo, or join by video from anywhere in Ontario.

Book a visit at FMU

Not sure yet? Book a free 15-minute intro call first.